González Trápaga, Rolando, Gustavo Aguirre, y Gary A. Adest. 2000. «Sex-Steroids Associated With the Reproductive Cycle in Male and Female Bolson Tortoise, Gopherus Flavomarginatus». ACTA ZOOLÓGICA MEXICANA (N.S.), n.º 80 (agosto):101-17. https://doi.org/10.21829/azm.2000.80801893.