Sothic cycle (English Wikipedia)

Gautschy, Rita; Habicht, Michael E.; Galassi, Francesco M.; Rutica, Daniela; Rühli, Frank J.; Hannig, Rainer (17 Nov 2017). "A new astronomically-based chronological model for the Egyptian Old Kingdom". Journal of Egyptian History. 10 (2): 69–108. doi:10.1163/18741665-12340035. ISSN 1874-1657. Retrieved 2021-01-24.

centuries.co.uk (Global: low place; English: low place)

James, Peter (1991). Centuries of Darkness. London, UK.{{cite book}}: CS1 maint: location missing publisher (link)

Kitchen, K.A. (October 1991). "The chronology of Ancient Egypt". World Archaeology. 23 (2): 205. doi:10.1080/00438243.1991.9980172.
Gautschy, Rita; Habicht, Michael E.; Galassi, Francesco M.; Rutica, Daniela; Rühli, Frank J.; Hannig, Rainer (17 Nov 2017). "A new astronomically-based chronological model for the Egyptian Old Kingdom". Journal of Egyptian History. 10 (2): 69–108. doi:10.1163/18741665-12340035. ISSN 1874-1657. Retrieved 2021-01-24.
Ingham, M.F. (1969). "The length of the Sothic cycle". The Journal of Egyptian Archaeology. 55: 36–40. doi:10.1177/030751336905500105. S2CID 192288579.
Ritner, Robert K.; Moeller, Nadine (2014). "The Ahmose 'Tempest Stela', Thera, and comparative chronology". Journal of Near Eastern Studies. 73 (1): 1–19. doi:10.1086/675069. JSTOR 10.1086/675069. S2CID 161410518.

Ritner, Robert K.; Moeller, Nadine (2014). "The Ahmose 'Tempest Stela', Thera, and comparative chronology". Journal of Near Eastern Studies. 73 (1): 1–19. doi:10.1086/675069. JSTOR 10.1086/675069. S2CID 161410518.

Ingham, M.F. (1969). "The length of the Sothic cycle". The Journal of Egyptian Archaeology. 55: 36–40. doi:10.1177/030751336905500105. S2CID 192288579.
Ritner, Robert K.; Moeller, Nadine (2014). "The Ahmose 'Tempest Stela', Thera, and comparative chronology". Journal of Near Eastern Studies. 73 (1): 1–19. doi:10.1086/675069. JSTOR 10.1086/675069. S2CID 161410518.

Gautschy, Rita; Habicht, Michael E.; Galassi, Francesco M.; Rutica, Daniela; Rühli, Frank J.; Hannig, Rainer (17 Nov 2017). "A new astronomically-based chronological model for the Egyptian Old Kingdom". Journal of Egyptian History. 10 (2): 69–108. doi:10.1163/18741665-12340035. ISSN 1874-1657. Retrieved 2021-01-24.