I. Martisius, D. Birvinskas, V. Jusas, and Z. Tamosevicius, “A 2-D DCT Hardware Codec based on Loeffler Algorithm”, ELEKTRON ELEKTROTECH, vol. 113, no. 7, pp. 47–50, Sep. 2011, doi: 10.5755/j01.eee.113.7.611.