Ngoy, K., De Meester, C., Pairon, D., Fabry, L., Loukakou, B., Nzouzi, C., Saintruf, G., Mercier, M., & Poncelet, F. (1984). Mutagenicity of Several Derivatives of Dipyrido[1,2-a-2′,3′-d]imidazoles. Mutation Research, 136(1), 23-31. https://doi.org/10.1016/0165-1218(84)90131-9 (Original work published 1984)