1. Polarized ethylenes: structures of (1,3-dimethyl-2-imidazolidinylidene)malononitrile and (1,3-dimethyl-2-perhydropyrimidinylidene)malononitrile
2. Polarized ethylenes: structures of [dimethylamino(methylthio)methylene]malononitrile (I), C7H9N3S, and [bis(dimethylamino)methylene]malononitrile (II), C8H12N4
3. Adhikesavalu, D., Kamath, N. U., and Venkatesan, K. (1983). Proc.—Indian Acad. Set, Sect. A Part 1 92(4&5), 449.
4. Alléaume, M. (1967). Thesis, University of Bordeaux.