Nief, O. A. Synthesis and Identification of Heterocyclic Compounds (Oxazepine, Tetrazole) Derived from Benzidine As Photostabilizing for Poly Vinyl Chloride. Al-Mustansiriyah Journal of Science 2018, 28 (2), 108-118. https://doi.org/10.23851/mjs.v28i2.521.