Naresh Yadav, R. et al. 2018. Novel Synthesis of Bis-β-Lactams with Unusual 2,7-Phenanthrene and 9,10-Dihydrophenanthrene Derivatives. Asian Journal of Organic & Medicinal Chemistry. 3, 3 (Sep. 2018), 85–88. DOI:https://doi.org/10.14233/ajomc.2018.AJOMC-P110.