S. M. Kayser Azam, Muhammad I. Ibrahimy, S. M. A. Motakabber, and A. K. M. Zakir Hossain. “MICROSTRIP COUPLED LINE BANDPASS FILTER WITH RADIAL STUBS FOR NARROW-BAND APPLICATIONS”. GEOMATE Journal, vol. 13, no. 40, Dec. 2017, pp. 183-8, https://geomatejournal.com/geomate/article/view/1390.