del P, M., M. Gutiérrez-Nava, O. Morales-Saavedra, J. Re, na-González., and E. Rivera. “Optical Properties and Aggregation of 1-N-Methylamino-4’-Nitroazobenzene in Various Environments”. Revista Mexicana De Física, vol. 54, no. 3, Jan. 2008, pp. 229-0, https://rmf.smf.mx/ojs/index.php/rmf/article/view/3613.