Zangade, S. “Irradiation of Tungsten Light: A Useful Energy Source for Synthesis of 4,5-Dihydro-Pyrazole-1-Carbaldehyde Derivatives”. Orbital: The Electronic Journal of Chemistry, Vol. 9, no. 4, Oct. 2017, pp. 315-7, https://periodicos.ufms.br/index.php/orbital/article/view/16458.