Abdel-Rahman, R. M., Makki, M. S. T., Ali, T. E.-S., & Ibrahim, M. A. (2010). 1,2,4-Triazine Chemistry Part I: Orientation of cyclization reactions of functionalized 1,2,4-triazine derivatives. European Journal of Chemistry, 1(3), 236–245. https://doi.org/10.5155/eurjchem.1.3.236-245.54