Transboundary breed: Belgian Blue. Domestic Animal Diversity Information System of the Food and Agriculture Organization of the United Nations. Accessed June 2022.
Hoflack, G.; Van den Broeck, W.; Maes, D.; Van Damme, K.; Opsomer, G.; Duchateau, L.; de Kruif, A.; Rodriguez-Martinez, H.; Van Soom, A. (1 February 2008). "Testicular dysfunction is responsible for low sperm quality in Belgian Blue bulls". Theriogenology. 69 (3): 323–332. doi:10.1016/j.theriogenology.2007.09.034. PMID18023470.
ghostarchive.org
Educational Vet Video (May 2009). "Video of Cow Caesarean Section". VetPulse TV in Practice. YouTube. Archived from the original on 2021-11-23. Retrieved 30 December 2013.
Hoflack, G.; Van den Broeck, W.; Maes, D.; Van Damme, K.; Opsomer, G.; Duchateau, L.; de Kruif, A.; Rodriguez-Martinez, H.; Van Soom, A. (1 February 2008). "Testicular dysfunction is responsible for low sperm quality in Belgian Blue bulls". Theriogenology. 69 (3): 323–332. doi:10.1016/j.theriogenology.2007.09.034. PMID18023470.
Educational Vet Video (May 2009). "Video of Cow Caesarean Section". VetPulse TV in Practice. YouTube. Archived from the original on 2021-11-23. Retrieved 30 December 2013.