Rigby, James H.; Ateeq, Humy S.; Charles, Nelly R.; Cuisiat, Stephane V.; Ferguson, Mark D.; Henshilwood, James A.; Krueger, A. Chris; Ogbu, Cyprian O.; Short, Kevin M.; Heeg Journal of the American Chemical Society, 1993 , vol. 115, # 4 p. 1382 - 1396