@InProceedings{Franch98,
  author   = {Xavier Franch},
  title    = {Systematic Formulation of Non-Functional Characteristics of Software},
  pages    = {174--181},
  booktitle = {Proc. 3rd Int'l Conf. on Requirements Engineering},
  year      = {1998},
  isbn      = {0-8186-8356-2},
  publisher = {IEEE Computer Society},
}