Luc Bougé Yann Le Guyadec Gil Utard Bernard Virot On the Expressivity of a Weakest Precondition Calculus for a Simple Data-Parallel Programming Language. 100-111 1994 conf/conpar/1994 CONPAR db/conf/conpar/conpar1994.html#BougeGUV94 http://dx.doi.org/10.1007/3-540-58430-7_10