calendrier

[1985] Mathematics of the Gregorian Calendar ; V. Frederick Rickey ; The Mathematical Intelligencer 7 (1985) p. 53 [lien]
[1988] On the Gregorian revision of the Julian calendar ; Jacques Dutka ; The Mathematical Intelligencer 10 (1988) p. 56 [lien]
[2005] History of one defeat: reform of the Julian calendar as envisaged by Isaac Newton ; Ari Belenkiy ; Eduardo Vila Echag├╝e ; Notes and Records 59 (2005) p. 223 [lien]