@Article\{JorgeBaptista_4_2010,
   author = {Jorge Baptista and Nuno J. Mamede and Fernando Gomes},
   title = {Auxiliary verbs and verbal chains in European Portuguese},
   booktitle = {9th International Conference on Computational Processing of the Portuguese Language (Propor 2010)},
   volume = {6001},
   pages = {110-119},
   publisher = {Springer Berlin / Heidelberg},
   series = {LNAI},
   location = {Porto Alegre, Brazil},
   year = {2010},
   month = {April},
}