El-Apasery, Morsy Ahmed, et al. “Synthesis of Some Biologically Active Monoazo Disperse Dyes Derived from Nicotinic Acid Derivatives under Microwave Irradiation for Dyeing Polyester Fabrics”. European Journal of Chemistry, vol. 4, no. 3, Sept. 2013, pp. 211-5, doi:10.5155/eurjchem.4.3.211-215.783.