Rodrigo O. Spínola Felipe C. R. Pinto Guilherme Horta Travassos Supporting Requirements Definition and Quality Assurance in Ubiquitous Software Project. 587-603 2008 ISoLA http://dx.doi.org/10.1007/978-3-540-88479-8_42 conf/isola/2008 db/conf/isola/isola2008.html#SpinolaPT08