Michel Bidoit Donald Sannella Andrzej Tarlecki Global Development via Local Observational Construction Steps. 1-24 2002 conf/mfcs/2002 MFCS http://link.springer.de/link/service/series/0558/bibs/2420/24200001.htm db/conf/mfcs/mfcs2002.html#BidoitST02