@misc{W2105539612,
  author = {Lawrence Chung and Julio César Sampaio do Prado Leite},
  title = {On Non-Functional Requirements in Software Engineering},
  year = {2009},
  howpublished = {Lecture notes in computer science},
  doi = {https://doi.org/10.1007/978-3-642-02463-4\_19}
}