“Experimental Study on the Mechanism of Action of 2-(2,6 Dichlorophenylamine)-2-Imidazoline Hydrochloride (ST-155)”. Revista Española De Fisiología, vol. 25, no. 4, Dec. 1969, pp. 233-7, https://revistas.unav.edu/index.php/ref/article/view/49143.