année
1979 / Astronomical meaning of a tropical year / Reuben Benumof / American Journal of Physics 47 (1979) p. 685 [doi]
1984 / Simple Formulae for Julian Day Numbers and Calendar Dates / D. A. Hatcher / Quarterly Journal of the Royal Astronomical Society 25 (1984) p. 53 [lien]
1985 / Generalized Equations for Julian Day Numbers and Calendar Dates / D. A. Hatcher / Quarterly Journal of the Royal Astronomical Society 26 (1985) p. 151 [lien]
1985 / Mathematics of the Gregorian Calendar / V. Frederick Rickey / The Mathematical Intelligencer 7 (1985) p. 53 [doi]
1986 / The Length of the Year in the Original Proposal for the Gregorian Calendar / N. M. Swerdlow / Journal for the History of Astronomy 17 (1986) p. 109 [lien]
1988 / On the Chronology of Leap Years / W. B. Somerville / Quarterly Journal of the Royal Astronomical Society 29 (1988) p. 397 [lien]
1998 / A Newly-Discovered Ancient Value for the Length of the Year / Eliyahu Beller / Archive for history of exact sciences 52 (1998) p. 91 [doi]
1998 / The Julian and Modified Julian Dates / D. D. McCarthy / Journal for the History of Astronomy 29 (1998) p. 327 [lien]
2001 / Combien de temps dure une année ? / Benoît Rittaud / Tangente 79 (2001) p. 8
2008 / La dernière minute de 2008 aura 61 secondes / Jean-François Haït / Ciel et Espace 463 (2008) p. 30