FIR Filters with minimum coefficient sensitivity. - Thomas L. Marzetta; Thomas W. Parks; Xiangkun Chen (ICASSP, 1986)

Design of FIR filters in the complex domain. - Xiangkun Chen; Thomas W. Parks (IEEE Trans. Acoust. Speech Signal Process., 1987)

Design of IIR filters in the complex domain. - Xiangkun Chen; Thomas W. Parks (IEEE Trans. Acoust. Speech Signal Process., 1990)