A. Olmos-Hernández, M. E. Trujillo-Ortega, M. Alonso-Spilsbury, M. Becerril-Herrera, R. Hernández-González, and D. Mota-Rojas, “Porcine recombinant somatotropin administered to piglets during the first week of life: effects on metabolic and somatometric variables”, Arch med vet, vol. 42, no. 2, pp. 93–99, Aug. 2010.