C. Sidney Burrus, Admadji W. Soewito, Ramesh A. Gopinath. Least squared error FIR filter design with spline transition functions. In 1990 International Conference on Acoustics, Speech, and Signal Processing, ICASSP '90, Albuquerque, New Mexico, USA, April 3-6, 1990. pages 1305-1308, IEEE, 1990. [doi]
Abstract is missing.