Fordyce, Geoffry, Jubb, Tristan F., Fitzpatrick, Lee A., Whyte, Tim. R, Cooper, Neil J., Bolam, Matt J., Haddon, David J., Hill, Felicity, and D'Occhio, Michael J. (2001) Contraceptive efficacy of an intra-uterine device in Brahman cattle. Animal Reproduction Science, 65 (3-4). pp. 193-204.