N. Q. Vuong, K. Nakjoong, T. T. Phuong Thao, N. L. Tuan and T. V. Sung, Synthesis of new alkoxy substituted 4-piperidinobenzylidene malononitrile (PDCST) nonlinear optical chromophores, VJChem 55 (2017) 163. DOI: https://doi.org/10.15625/2525-2321.2017-00437.