Rani, M., Kumar Shukla, D., & Ali Khan, A. (2013). One Pot Synthesis of 3,9-Bis-(2,4-di-tert-butyl phenoxy)-2,4,8,10-tetraoxa-3,9-diphospha-spiro[5.5]undecane, their Chalcogenides and Metal Complexes. Asian Journal of Chemistry, 25(8), 4556–4558. https://doi.org/10.14233/ajchem.2013.14068