The HUMAINE Database: Addressing the Collection and Annotation of Naturalistic and Induced Emotional Data. - Ellen Douglas-Cowie; Roddy Cowie; Ian Sneddon; Cate Cox; Orla Lowry; Margaret McRorie; Jean-Claude Martin; Laurence Devillers; Sarkis Abrilian; Anton Batliner; Noam Amir; Kostas Karpouzis (ACII, 2007)