1. [1] Jones TC, Hunt RD, King NW : Mammary gland, Veterinary pathology, 6th ed, 1190-1201, Lippincott Williams & Wilkins, Philadelphia (1997)
2. [2] Madewell BR, Theilen GH : Tumors of the mammary gland, Veterinary cancer medicine, 2nd ed, 327-344, Lea & Febiger, Philadelphia (1987)
3. [4] Ford TS, Ross MW, Acland HM, Madison JB : Primary teat neoplasia in two yearling heifers, J Am Vet Med Assoc, 195, 238-239 (1989)
4. [5] Ginn PE, Mansell JEKL, Rakich PM : Skin and appendages, Jubb, Kennedy & Palmer's pathology of domestic animals, Maxie MG ed, 5th ed, 1, 777-780, Saunders, Philadelphia (2007)
5. [6] Povey RC, Osborne AD : Mammary gland neoplasia in the cow, A review of the litrature and report of a fibrosarcoma, Pathol Vet, 6, 502-512 (1969)