БАБЕНКО, В.Г., МЕЛЬНИК, О.Г. and МЕЛЬНИК, Р.П. 2013. Сlassification of three-digit elementary functions for cryptographic transformation of the information. Ukrainian Scientific Journal of Information Security. 19, 1 (Apr. 2013), 56–59. DOI:https://doi.org/10.18372/2225-5036.19.4705.