@INPROCEEDINGS{TIB11c,
  Author = {Tibermacine, Chouki and Zernadji, Tarek},
  Title = {Supervising the Evolution of Web Service 
  Orchestrations using Quality Requirements},
  Booktitle = {In proceedings of the 5th 
  European Conference on Software Architectures (ECSA'11)},
  Month = {September},
  Year = {2011},
  Address = {Essen, Germany},
  Publisher = {Springer-Verlag}
}