Characterization of three Lactobacillus helveticus peptidases - Palva, Airi; Vesanto, Erkki; Varmanen, Pekka; Peltoniemi, Kirsi; Rantanen, Terhi; Savijoki, Kirsi; Purtsi, Tiina; Steele, J. (European Commission, Biotechnology and Fair Programmes, 1995)