@book{DEC+98, 
    title = {Data Refinement Model-Oriented Proof methods and their Comparison }, 
    author = {De Roever, Willem-Paul and Engelhardt, Kai and Coenen, Jos and Buth, Karl-Heinz and Gardiner, Paul and Lakhnech, Yassine and Stomp, Frank},
    year = {1998},
    publisher = {Cambridge University Press},
    team = {DCS},
}