Arrahman1, A. et al. 2014. Microwave Assisted Synthesis of Pyridin-1-ium Salt of 6-Nitroquinazolin-4-one and its 6-Amino Analog under Ultrasonic Irradiation. Asian Journal of Chemistry. 26, 23 (Dec. 2014), 7904–7906. DOI:https://doi.org/10.14233/ajchem.2014.16697.