Wei, Qing-Li, Yong-Hong Wen, Shu-Sheng Zhang, Nian Liu, and Juan Liang. “Synthesis and Quantum Chemistry Study of Amide-Type Acyclic Polyether”. Asian Journal of Chemistry 18, no. 1 (March 30, 2010): 259–267. Accessed August 26, 2024. https://asianpubs.org/index.php/ajchem/article/view/21289.