Kharchenko, A. Y., Romakh, M. A., Yanova, K. V., Tereshchuk, M. N. and Mchedlov-Petrossyan, N. O. (2019) “Aqueous solution of poly (hexamethylene guanidine hydrochloride) and poly (diethylenamine guanidine hydrochloride) as studied with acid-base indicators”, V. N. Karazin Kharkiv National University Bulletin. Chemical series, 0(33), pp. 65-76. doi: 10.26565/2220-637X-2019-33-05.