Atasoyu, M., Metin, B. M., Kuntman, H. and Herencsar, N. (2015) “New Current-Mode Class 1 Frequency-Agile Filter for Multi Protocol GPS Application”, Elektronika ir Elektrotechnika, 21(5), pp. 35-39. doi: 10.5755/j01.eee.21.5.13323.