AHUMADA: a large speech corpus in Spanish for speaker identification and verification. - Javier Ortega-Garcia; Joaquín González-Rodríguez; Victoria Marrero-Aguiar; Juan J. Díaz-Gómez; Ramon Garcia-Jimenez; Jose Juan Lucena-Molina; José A. G. Sanchez-Molero (ICASSP, 1998)