Lapworth, Charles (1879). "On the tripartite classification of the Lower Palaeozoic rocks". Geological Magazine. 2nd series. 6 (1): 1-15. Bibcode:1879GeoM....6....1L. doi:10.1017/s0016756800156560. From pp. 13–14: "North Wales itself – at all events the whole of the great Bala district where Sedgwick first worked out the physical succession among the rocks of the intermediate or so-called Upper Cambrian or Lower Silurian system; and in all probability much of the Shelve and the Caradoc area, whence Murchison first published its distinctive fossils – lay within the territory of the Ordovices; … Here, then, have we the hint for the appropriate title for the central system of the Lower Palaeozoics. It should be called the Ordovician System, after this old British tribe."
DiMichele, William A; Hook, Robert W (1992). "The Silurian". Behrensmeyer, Anna K. (Ed.). Terrestrial Ecosystems Through Time: Evolutionary Paleoecology of Terrestrial Plants and Animals. University of Chicago Press. ss. 207-10. ISBN978-0-226-04155-1.
Jeppsson, L.; Calner, M. (2007). "The Silurian Mulde Event and a scenario for secundo—secundo events". Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 93 (02): 135–154. doi:10.1017/S0263593300000377.
Munnecke, A.; Samtleben, C.; Bickert, T. (2003). "The Ireviken Event in the lower Silurian of Gotland, Sweden-relation to similar Palaeozoic and Proterozoic events". Palaeogeography, Palaeoclimatology, Palaeoecology. 195 (1): 99–124. doi:10.1016/S0031-0182(03)00304-3.
Lapworth, Charles (1879). "On the tripartite classification of the Lower Palaeozoic rocks". Geological Magazine. 2nd series. 6 (1): 1-15. Bibcode:1879GeoM....6....1L. doi:10.1017/s0016756800156560. From pp. 13–14: "North Wales itself – at all events the whole of the great Bala district where Sedgwick first worked out the physical succession among the rocks of the intermediate or so-called Upper Cambrian or Lower Silurian system; and in all probability much of the Shelve and the Caradoc area, whence Murchison first published its distinctive fossils – lay within the territory of the Ordovices; … Here, then, have we the hint for the appropriate title for the central system of the Lower Palaeozoics. It should be called the Ordovician System, after this old British tribe."
Trotter, Julie A.; Williams, Ian S.; Barnes, Christopher R.; Männik, Peep; Simpson, Andrew (February 2016). "New conodont δ18O records of Silurian climate change: Implications for environmental and biological events". Palaeogeography, Palaeoclimatology, Palaeoecology. 443: 34-48. Bibcode:2016PPP...443...34T. doi:10.1016/j.palaeo.2015.11.011.
Nealon, T.; Williams, D. Michael (30 Nisan 2007). "Storm-influenced shelf deposits from the silurian of Western Ireland: A reinterpretation of deep basin sediments". Geological Journal. 23 (4): 311-320. doi:10.1002/gj.3350230403.
Lang, W.H.; Cookson, I.C. (1935). "On a flora, including vascular land plants, associated with Monograptus, in rocks of Silurian age, from Victoria, Australia". Philosophical Transactions of the Royal Society of London B. 224 (517): 421-449. Bibcode:1935RSPTB.224..421L. doi:10.1098/rstb.1935.0004.
Hueber, F.M. (1983). "A new species of Baragwanathia from the Sextant Formation (Emsian) Northern Ontario, Canada". Botanical Journal of the Linnean Society. 86 (1–2): 57-79. doi:10.1111/j.1095-8339.1983.tb00717.x.
Lapworth, Charles (1879). "On the tripartite classification of the Lower Palaeozoic rocks". Geological Magazine. 2nd series. 6 (1): 1-15. Bibcode:1879GeoM....6....1L. doi:10.1017/s0016756800156560. From pp. 13–14: "North Wales itself – at all events the whole of the great Bala district where Sedgwick first worked out the physical succession among the rocks of the intermediate or so-called Upper Cambrian or Lower Silurian system; and in all probability much of the Shelve and the Caradoc area, whence Murchison first published its distinctive fossils – lay within the territory of the Ordovices; … Here, then, have we the hint for the appropriate title for the central system of the Lower Palaeozoics. It should be called the Ordovician System, after this old British tribe."
Trotter, Julie A.; Williams, Ian S.; Barnes, Christopher R.; Männik, Peep; Simpson, Andrew (February 2016). "New conodont δ18O records of Silurian climate change: Implications for environmental and biological events". Palaeogeography, Palaeoclimatology, Palaeoecology. 443: 34-48. Bibcode:2016PPP...443...34T. doi:10.1016/j.palaeo.2015.11.011.
Lang, W.H.; Cookson, I.C. (1935). "On a flora, including vascular land plants, associated with Monograptus, in rocks of Silurian age, from Victoria, Australia". Philosophical Transactions of the Royal Society of London B. 224 (517): 421-449. Bibcode:1935RSPTB.224..421L. doi:10.1098/rstb.1935.0004.
The Gotlandian system was proposed in 1893 by the French geologist Albert Auguste Cochon de Lapparent (1839–1908): Lapparent, A. de (1893). Traité de Géologie (Fransızca). 2 (3. bas.). Paris, France: F. Savy. s. 748. 30 Ağustos 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 30 Ağustos 2023. From p. 748: "D'accord avec ces divisions, on distingue communément dans le silurien trois étages: l'étage inférieur ou cambrien (1) ; l'étage moyen ou ordovicien (2) ; l'étage supérieur ou gothlandien (3)." (In agreement with these divisions, one generally distinguishes, within the Silurian, three stages: the lower stage or Cambrian [1]; the middle stage or Ordovician [2]; the upper stage or Gotlandian [3].)
Barrande, Joachim (1852). Systême silurien du centre de la Bohême (Fransızca). Paris, France and Prague, (Czech Republic): (Self-published). ss. ix-x. 30 Ağustos 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 30 Ağustos 2023.
Forbes, Edward (1854). "Anniversary Address of the President". Quarterly Journal of the Geological Society of London. 10: xxii-lxxxi. 30 Ağustos 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 30 Ağustos 2023. See p. xxxiv.
The Gotlandian system was proposed in 1893 by the French geologist Albert Auguste Cochon de Lapparent (1839–1908): Lapparent, A. de (1893). Traité de Géologie (Fransızca). 2 (3. bas.). Paris, France: F. Savy. s. 748. 30 Ağustos 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 30 Ağustos 2023. From p. 748: "D'accord avec ces divisions, on distingue communément dans le silurien trois étages: l'étage inférieur ou cambrien (1) ; l'étage moyen ou ordovicien (2) ; l'étage supérieur ou gothlandien (3)." (In agreement with these divisions, one generally distinguishes, within the Silurian, three stages: the lower stage or Cambrian [1]; the middle stage or Ordovician [2]; the upper stage or Gotlandian [3].)
Barrande, Joachim (1852). Systême silurien du centre de la Bohême (Fransızca). Paris, France and Prague, (Czech Republic): (Self-published). ss. ix-x. 30 Ağustos 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 30 Ağustos 2023.
Forbes, Edward (1854). "Anniversary Address of the President". Quarterly Journal of the Geological Society of London. 10: xxii-lxxxi. 30 Ağustos 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 30 Ağustos 2023. See p. xxxiv.