Variation in reproductive traits of members of the genus Canis with special attention to the domestic dog (Canis familiaris) Lord, Kathryn ; Feinstein, Mark ; Smith, Bradley ; Coppinger, Raymond Abstract Publication: Behavioural Processes Pub Date: January 2013 DOI: 10.1016/j.beproc.2012.10.009 Bibcode: 2013BehPr..92..131L