Rani, M. et al. 2013. Synthesis of 3-(4-Methyl-phenyl)-2-phenyl-3,4-dihydro-2H-benzo[e][1,3,2]oxazaphosphinine and Its Chalcogenides. Asian Journal of Chemistry. 25, 6 (Jan. 2013), 3449–3451. DOI:https://doi.org/10.14233/ajchem.2013.13937.