Ayres , S. E., and P. G. Thomas. “Population Characteristics of 453 Bitches Undergoing 510 Cesarean Section Procedures Between 1999 and 2009–a Retrospective Study”. Clinical Theriogenology, vol. 2, no. 4, Sept. 2010, pp. 451-65, doi:10.58292/CT.v2.11320.