Giovani Rubert Librelotto Renato Preigschadt de Azevedo José Carlos Ramalho Pedro Rangel Henriques Comparing Topic Maps Constraint Specification Languages. 86-97 2007 TMRA http://dx.doi.org/10.1007/978-3-540-70874-2_10 conf/tmra/2007 db/conf/tmra/tmra2007.html#LibrelottoARH07