Kalchenko, O. I.; Cherenok, S. O.; Solovyov, A. V.; Gorbatchuk, V. V.; Suikov, S. Y.; Kalchenko, V. I. The Study of the Complexation of Calix[4]arene and Calix[4]resorcinarene With Resin Acids by the RP HPLC Method. Binding Constants Determination. J. Org. Pharm. Chem. 2016, 14, 41-46.