1. Bronchus- associated lymphoid tissue in the lungs of cattle: relationship to age;Anderson;Research in Veterinary Science,1986
2. Manual of Histological Techniques;Bancroft,1984
3. Applied Veterinary Histology;Banks,1993
4. Baron, R. (1984). Splanchnologie I: Appareil digestif et respiratoire. In: Anatomie Comparée des Mammifères Domestiques, Vol. 3, R. Baron, Ed., Vigot, Paris.
5. The epithelium of canine palatine tonsils;Belz;Anatomica Embryologica (Berlin),1995