A novel microstrip bandpass filter design using asymmetric parallel coupled-line. - Si-Weng Fok; Phillip Ngai Cheong; Kam-Weng Tam; Rui Paulo Martins (ISCAS (1), 2005)

Interactive IIR SC Multirate Compiler Applied to Multistage decimator Design. - Phillip Ngai Cheong; Rui Paulo Martins (J. Circuits Syst. Comput., 2007)