Wavelet-based cepstrum calculation - Sanchez, Fabrício Lopes; Barbon Júnior, Sylvio; Vieira, Lucimar Sasso; Guido, Rodrigo Capobianco; Fonseca, Everthon Silva; Scalassara, Paulo Rogério; Maciel, Carlos Dias; Pereira, Jose Carlos; Shi, Huang Chen (Journal of Computational and Applied Mathematics, 2009)