Evan E. Bolton; Yanli Wang; Paul A. Thiessen; Stephen H. Bryant (2008). „Chapter 12 PubChem: Integrated Platform of Small Molecules and Biological Activities”. Annual Reports in Computational Chemistry. 4: 217—241. doi:10.1016/S1574-1400(08)00012-1.
Sybertz, E. J.; Baum, T.; Pula, K. K.; Nelson, S.; Eynon, E.; Sabin, C. (1982). „Studies on the mechanism of the acute antihypertensive and vasodilator actions of several beta-adrenoceptor antagonists”. J. Cardiovasc. Pharmacol. 4 (5): 749—58. PMID6182405. S2CID34100646. doi:10.1097/00005344-198209000-00009.
DE 2728641, Philion, Richard Everett, "4-Hydroxyphenylalkanolaminderivate und Verfahren zu deren Herstellung [4-Hydroxyphenylalkanolamine derivatives and processes preparation thereof]", published 1978-01-05, assigned to Sterling Drug Inc.
Sybertz, E. J.; Baum, T.; Pula, K. K.; Nelson, S.; Eynon, E.; Sabin, C. (1982). „Studies on the mechanism of the acute antihypertensive and vasodilator actions of several beta-adrenoceptor antagonists”. J. Cardiovasc. Pharmacol. 4 (5): 749—58. PMID6182405. S2CID34100646. doi:10.1097/00005344-198209000-00009.
Sybertz, E. J.; Baum, T.; Pula, K. K.; Nelson, S.; Eynon, E.; Sabin, C. (1982). „Studies on the mechanism of the acute antihypertensive and vasodilator actions of several beta-adrenoceptor antagonists”. J. Cardiovasc. Pharmacol. 4 (5): 749—58. PMID6182405. S2CID34100646. doi:10.1097/00005344-198209000-00009.