Hawkins, Ed (January 30, 2020). "2019 years". climate-lab-book.ac.uk. Archived from the original on February 2, 2020. ("The data show that the modern period is very different to what occurred in the past. The often quoted Medieval Warm Period and Little Ice Age are real phenomena, but small compared to the recent changes.")
Briffa, K.R (1998). "Influence of Volcanic Eruptions on Northern Hemisphere Summer Temperature over the Past 600 Years". Nature. 393 (6684): 450–55. Bibcode:1998Natur.393..450B. doi:10.1038/30943. S2CID4392636 – via Springer Science and Business Media LLC.
Oppenheimer, Clive (2003). "Climatic, environmental and human consequences of the largest known historic eruption:Tambora volcano (Indonesia) 1815". Progress in Physical Geography. 27, 2 (2): 230–59. doi:10.1191/0309133303pp379ra. S2CID131663534 – via SciTech Premium Collection.
Briffa, K.R (1998). "Influence of Volcanic Eruptions on Northern Hemisphere Summer Temperature over the Past 600 Years". Nature. 393 (6684): 450–55. Bibcode:1998Natur.393..450B. doi:10.1038/30943. S2CID4392636 – via Springer Science and Business Media LLC.
Briffa, K.R (1998). "Influence of Volcanic Eruptions on Northern Hemisphere Summer Temperature over the Past 600 Years". Nature. 393 (6684): 450–55. Bibcode:1998Natur.393..450B. doi:10.1038/30943. S2CID4392636 – via Springer Science and Business Media LLC.
Oppenheimer, Clive (2003). "Climatic, environmental and human consequences of the largest known historic eruption:Tambora volcano (Indonesia) 1815". Progress in Physical Geography. 27, 2 (2): 230–59. doi:10.1191/0309133303pp379ra. S2CID131663534 – via SciTech Premium Collection.
"Tongkoko". www.volcanodiscovery.com (in Italian). Retrieved 2020-11-13.
web.archive.org
Hawkins, Ed (January 30, 2020). "2019 years". climate-lab-book.ac.uk. Archived from the original on February 2, 2020. ("The data show that the modern period is very different to what occurred in the past. The often quoted Medieval Warm Period and Little Ice Age are real phenomena, but small compared to the recent changes.")