“Role of Polyamines in Proliferation and Differentiation of Dictyostelium Discoideum As Ascertained by Difluoromethylornithine Treatment”. Revista Española De Fisiología, vol. 43, no. 4, Dec. 1987, pp. 439-43, https://revistas.unav.edu/index.php/ref/article/view/46808.