Performance evaluation of the program of DCT-II using cyclic convolutions. - Ihor Prots'ko; Roman Rikmas; Marta Mashevska (CSIT (1), 2017)

The Analysis of Models of the Block-cyclic Structures of the DCT-II core for the Synthesis of Fast Algorithms. - Ihor Prots'ko; Roman Rykmas (ICST, 2023)

Improving the Convolutional Formulation for Efficient Computations of Short-Length DHT. - Roman Rykmas; Ihor Prots'ko (IEEE Signal Process. Lett., 2025)