Nerone Caesare Augusto Cosso Lentuol Cossil fil. Cos. VIII idus Febr(u)arius dies solis, luna XIIIIX nun(dinae) Cumis, V (idus Februarias) nun(dinae) Pompeis. Robert Hannah, "Time in Written Spaces", in: Peter Keegan, Gareth Sears, Ray Laurence (eds.), Written Space in the Latin West, 200 BC to AD 300, A&C Black, 2013,
p. 89.
harvard.edu
ui.adsabs.harvard.edu
Falk, Michael (ngày 19 tháng 3 năm 1999). “Astronomical names for the days of the week”. Journal of the Royal Astronomical Society of Canada. 93 (1999–06): 122–133. Bibcode:1999JRASC..93..122F.