Design, Use and Implementation of SPELL, a language for Software Process Modelling and Evolution. - Reidar Conradi; Maria Letizia Jaccheri; Cristina Mazzi; Minh Ngoc Nguyen 001; Amund Aarsten (EWSPT, 1992)

Variability of Process Models and the EPOS Solution. - Reidar Conradi; Maria Letizia Jaccheri; Cristina Mazzi (ISPW, 1993)