M. Hernandez, M. Lopez, D. Rojas, A. Iglesias, R. Necoechea, A. Hem�ndez, J. Ram�rez and M. Spilsbury
International Journal of Zoological Research 2 ( 4 ): 362 - 368 , 2006
M. Alonso- Spilsbury, I. Escobar- Ibarra, L. Mayagoitia, R. Ramirez -Necoechea and D. Mota- Rojas
International Journal of Zoological Research 2 ( 4 ): 334 - 343 , 2006