;;; cal-mayan.el --- calendar functions for the Mayan calendars.
-;; Copyright (C) 1992, 1993, 1995 Free Software Foundation, Inc.
+;; Copyright (C) 1992, 1993, 1995, 1997 Free Software Foundation, Inc.
;; Author: Stewart M. Clamen <clamen@cs.cmu.edu>
;; Edward M. Reingold <reingold@cs.uiuc.edu>
;; Comments, improvements, and bug reports should be sent to Reingold.
;; Technical details of the Mayan calendrical calculations can be found in
+;; ``Calendrical Calculations'' by Nachum Dershowitz and Edward M. Reingold,
+;; Cambridge University Press (1997), and in
;; ``Calendrical Calculations, Part II: Three Historical Calendars''
;; by E. M. Reingold, N. Dershowitz, and S. M. Clamen,
;; Software--Practice and Experience, Volume 23, Number 4 (April, 1993),