Wang1, Wei, and Yong-Miao Shen2. “Synthesis of 2-(t-Butyl)dimethyl-Silyloxy-2-Cyclopropyl- 1-Ethyl-Triphenylphosphonium Iodide and Its Crystal Structure”. Asian Journal of Chemistry, vol. 23, no. 5, Jan. 2011, pp. 2227-8, https://asianpubs.org/index.php/ajchem/article/view/10336.