%% You should probably cite rfc6351 instead of this I-D. @techreport{ietf-vcarddav-vcardxml-11, number = {draft-ietf-vcarddav-vcardxml-11}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-vcarddav-vcardxml/11/}, author = {Simon Perreault}, title = {{xCard: vCard XML Representation}}, pagetotal = 22, year = 2011, month = may, day = 26, abstract = {This document defines the XML schema of the vCard data format. {[}STANDARDS-TRACK{]}}, }