Cormac Herley, Jelena Kovacevic, Kannan Ramchandran, Martin Vetterli. Time-varying orthonormal tilings of the time-frequency plane. In IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '93, Minneapolis, Minnesota, USA, April 27-30, 1993. pages 205-208, IEEE Computer Society, 1993. [doi]