1. Goldschmidt M, Dunstan R, Stannard A, von Tscharner C, Walder E, Yager, J: Histologic Classifi cation of Tumors of the Skin of Domestic Animals, World Health Organization International Classifi cation of Tumors of Domestic Animals, Second Series, Vol III, Washington, D.C., Armed Forces Institute of Pathology, American Registry of Pathology, 1998.
2. Schwegler K., Walter J, Rudolph, R: Epithelial neoplasms of the skin, the cutaneous mucosa ant the transitional epithelium in dogs: an immunolocalization study for papilomavirus antigen. Zentral Vetertinarmed A 1997, 44:115-123, 1997.10.1111/j.1439-0442.1997.tb01093.x
5. Theon A, Madewell B, Shearn, V: Prognostic factors assosiated with radiotherapy of squamous cell carcinoma of the nasal plane in cats. J Am Vet Med Assoc 1995, 196:991-996.10.2460/javma.1995.206.07.991
14. Simeonov R: Nuclear morphometry in relation to tumor grade in canine spontaneous cutaneous squamous cell carcinomas. Turk J Vet Anim Sci 2009, 33:439-442.10.3906/vet-0805-18