@inproceedings{ruizwcsf03b,
   author = {Linnyer B. Ruiz and Kalina Ramos Porto and A. A. Loureiro and Jos\'{e} Marcos S. Nogueira},
   title = {Quality of Services in Wireless Sensors Networks (in Portuguese)},
   booktitle = {Proceedings of the 5th Wireless Communication and Mobile Computing Workshop ({WCSF'03})},
   year = {2003}, 
   address = {S\~{a}o Louren\c{c}o, MG, Brazil},
   month = {October},
   note = {Tutorial}
}