Vaughan, J. R.; Anderson, G. W.; Clapp, R. C.; Clark, J. H.; English, J. P.; Howard, K. L.; Marson, H. W.; Sutherland, L. H.; Denton, J. J. (1949). “Antihistamine agents; halogenated N,N-dimethyl-N-benzyl-N-(2-pyridyl)-ethylenediamines”. Journal of Organic Chemistry. 14 (2): 228–234. doi:10.1021/jo01154a006. PMID18117722.
Vaughan, J. R.; Anderson, G. W.; Clapp, R. C.; Clark, J. H.; English, J. P.; Howard, K. L.; Marson, H. W.; Sutherland, L. H.; Denton, J. J. (1949). “Antihistamine agents; halogenated N,N-dimethyl-N-benzyl-N-(2-pyridyl)-ethylenediamines”. Journal of Organic Chemistry. 14 (2): 228–234. doi:10.1021/jo01154a006. PMID18117722.