ARMAN TAHERPOUR, AVAT, and MOSTAFA YOUSEFIRAD. “Theoretical Isomerization Study of [(R)CalixTMS 2]Ge Macrocycles”. Asian Journal of Chemistry, vol. 20, no. 4, Mar. 2010, pp. 2741-8, https://asianpubs.org/index.php/ajchem/article/view/12703.