VESSALLY, E., GHASSABI, B., KHOJASTEH, A., & FATEH, S. (2010). Conformational Studies on Divalent Rings C4HnM (n = 4, 6 and 8; M = C, Si, Ge, Sn and Pb). Asian Journal of Chemistry, 22(2), 929–933. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/11205