Sá, M. S. de, Juncá, F. A., Carvalho, L. C. P. de, Santos, R. dos and Soares, M. B. P. (2007) “Evaluation of immunomodulatory activity of skin and parotoid gland extracts of anure from Brazilian semi-arid region”, SITIENTIBUS série Ciências Biológicas, 7(4), pp. 410–415. doi: 10.13102/scb8111.