論文（英文）
Intracranial meningioma with polygonal granular cell appearance in a Chihuahua.
Takeuchi Y, Ohnishi Y, Matsunaga S, Nakayama H, Uetsuka K. Intracranial meningioma with polygonal granular cell appearance in a Chihuahua. J Vet Med Sci. 2008; 70(5): 529–532.