Masnabadi,N . "DFT Study and NBO Analysis of Conformation Properties of 2,5,5-Trimethyl-1,3,2-Dioxaphosphinane 2-Selenide and Their Dithia and Diselena Analogous", Journal of Sciences, Islamic Republic of Iran, 31, 2, 2020, 137-146. doi: 10.22059/jsciences.2020.289819.1007453