Jacques Cazin Patrice Cros René Jacquart Michel Lemoine P. Michel Construction and Reuse of Formal Program Developments. 120-136 1991 conf/tapsoft/1991-2 TAPSOFT, Vol.2 db/conf/tapsoft/tapsoft91-2.html#CazinCJLM91 http://dx.doi.org/10.1007/3540539816_64