Mickelson A., Graham J., Moffett P., Bisiau C., and McCue P. “Oxytocin or Prostaglandin Failed to Improve Pharmacologically Induced Ejaculation in Stallions”. Clinical Theriogenology, vol. 12, no. 4, Dec. 2020, pp. 481-5, doi:10.58292/ct.v12.9446.