Sayidi, Muhammad, and Mudrik Alaydrus. “Designing of Hairpin-Line Band Pass Filters for DCS, UMTS and LTE-Systems”. InComTech : Jurnal Telekomunikasi Dan Komputer, vol. 6, no. 3, Feb. 2017, pp. 239-53, doi:10.22441/incomtech.v6i3.1158.