V. O. Kovtunenko, L. M. Potikha, T. S. Bulda, R. I. Zubatyuk, and O. V. Shishkin, “The synthetic method for 1-(phenyl)alkyl-3-acyl-1,2,8-triazaspiro[4.5]decanes”, J. Org. Pharm. Chem., vol. 14, no. 1(53), pp. 61–66, Mar. 2016.