Cyzio, K., and J. Lubczak. “New Possibilities to Synthesize Oligoetherols With Azacyclic Rings”. Polimery 56, no. 11-12 (December 30, 2011): 856-860. Accessed April 20, 2024. http://polimery.ichp.vot.pl/index.php/p/article/view/977.