“Effect of Rectal Administration of N-(4-Methyl-Benzolsulfonyl) N-Butyl-Carbamide on Blood Sugar of Hypophysectomized and Diabetic Dogs”. Revista Española De Fisiología, vol. 13, no. 3, Sept. 1957, pp. 195-9, https://revistas.unav.edu/index.php/ref/article/view/48850.