https://vocabularyserver.com/bll/en/ Bibliography of Linguistic Literature Thesaurus University Library Frankfurt, Germany linguistic, literatura, language University Library Frankfurt, Germany 2018-07-30 en 2018-07-30 09:26:30 Optimality theory (semant.) 2018-07-30 09:26:30 semant. https://vocabularyserver.com/bll/en/xml.php?skosTema=699