Urry, Grant; Wartik, Thomas; Moore, R. E.; Schlesinger, H. I. (1954). Journal of the American Chemical Society76 (21): 5293. doi:10.1021/ja01650a010.
Urry, Grant; Kerrigan, James; Parsons, Theran D.; Schlesinger, H. I. (1954). Journal of the American Chemical Society76 (21): 5299. doi:10.1021/ja01650a011.