Margotta, V. “Relationships Between Seasonal Thermal Variations and Cell Proliferation in Heterothermic Vertebrates, As Revealed by PCNA Expression in the Brain of Adult <em>Rana burger</Em> (Günther, 1986)”. Italian Journal of Anatomy and Embryology, vol. 117, no. 1, June 2012, pp. 45-53, https://oajournals.fupress.net/index.php/ijae/article/view/1111.