VANZANI, M. C., IACONO, R. F., ALONSO, A. et al. Immunochemical expression of proliferative cell nuclear antigen in aging cultured astrocytes. Medicina (B. Aires). [online]. jul./ago. 2003, vol.63, no.4 [citado 24 julio de 2008], p.303-306. Disponible en la World Wide Web: [1]. ISSN 0025-7680.
