In the article intercommunication is considered between efficiency of action of difficult catalytic solutions [cobalt naftenate – polyethyleneglicol – cyclohexanone] in the process of liquid-phase oxidization of cyclohexane and complexes formation between the component components of catalytic solutions.
 Ivashchuk O.S.: Diss. ... for Ph. D. Award (technical sciences). Lviv, 2007.
 Ivashchuk O.S. , Mel’nyk Yu.R., Reutskyy V.V.: Announcer of the National university „Lvivs’ka politechnika”. Chemistry, technology of matters and their application. Lviv, 2006. №553, 149-152.
 Mironov V.A., Yankovskyy S.A.: Spektroscopy in organic chemistry. Moscow, 1985.
 Kazitsyna L.A., Kupletskaya N.B.: Application of UV-, IR-, NMR-spektroskopies in organic chemistry. Moscow, 1971.
 Khiraoka M.: Crown-formations. Properties and application. Moscow, 1986.