%% You should probably cite draft-ietf-calext-rscale instead of this I-D. @techreport{daboo-icalendar-rscale-03, number = {draft-daboo-icalendar-rscale-03}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-daboo-icalendar-rscale/03/}, author = {Cyrus Daboo and Gregory Yakushev}, title = {{Non-Gregorian Recurrence Rules in iCalendar}}, pagetotal = 14, year = 2014, month = mar, day = 15, abstract = {This document defines how non-Gregorian recurrence rules can be specified in iCalendar data.}, }