\input zb-basic \input zb-ioport \iteman{io-port 03768960} \itemau{Raynal, Michel} \itemti{Une analyse de la specification de la cooperation entre processus par variables partagees.} \itemso{RAIRO, Tech. Sci. Inf. 1, 201-210 (1982).} \itemcc{} \itemut{shared variables cooperation specification; processes; synchronization; concurrency; communication; parallel programs} \itemli{} \end