SOFTLIB-A Documentation Management System. - Ian Sommerville; Ray Welland; I. Bennett; Ronny Thomson (Softw. Pract. Exp., 1986)

Configuration Management Using SySL. - Ronny Thomson; Ian Sommerville (SCM, 1989)

An Approach to the Support of Software Evolution. - Ian Sommerville; Ronny Thomson (Comput. J., 1989)