handle dates in years BC."
;; For an explanation, see the footnote on page 384 of "Calendrical
;; Calculations, Part II: Three Historical Calendars" by
- ;; E. M. Reingold, N. Dershowitz, and S. M. Clamen,
+ ;; E. M. Reingold, N. Dershowitz, and S. M. Clamen,
;; Software--Practice and Experience, Volume 23, Number 4 (April,
;; 1993), pages 383-404 <https://doi.org/10.1002/spe.4380230404>
;; <http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.42.6421&rep=rep1&type=pdf>.