Martisius, I., D. Birvinskas, V. Jusas, and Z. Tamosevicius. “A 2-D DCT Hardware Codec Based on Loeffler Algorithm”. Elektronika Ir Elektrotechnika, vol. 113, no. 7, Sept. 2011, pp. 47-50, doi:10.5755/j01.eee.113.7.611.