re ira ’ s ▁doctor al ▁th esis , ▁published ▁in ▁ 2 0 0 5 , ▁is ▁a ▁very ▁detailed ▁lex ical ▁study ▁of ▁Mat is ▁language ▁that ▁includes ▁a ▁ 1 , 5 4 7 - word ▁Portuguese - Mat is ▁dictionary . ▁The ▁dis sert ation ▁goes ▁into ▁detail ▁on ▁the ▁lex ic ography , ▁semantics , ▁and ▁morph os yntax ▁of ▁Mat is ▁language ▁as ▁well ▁as ▁giving ▁over views ▁of ▁Mat is ▁and ▁P ano ▁eth no - history . ▁ ▁Rog éri o ▁Vic ente ▁Fer re ira , ▁a ▁research er ▁at ▁the ▁Univers idade ▁Federal ▁de ▁M ato ▁Gros so ▁do ▁Sul , ▁has ▁also ▁produced ▁a ▁number ▁of ▁key ▁texts ▁regarding ▁the ▁Mat is ▁language . ▁Among ▁the ▁most ▁descript ive ▁is ▁a ▁thorough ▁morph os ynt actic ▁description ▁of ▁the ▁language ▁that ▁discuss es ▁ph on etic ▁and ▁morph ological ▁aspects , ▁n oun s , ▁ver bs , ▁ad ver bs , ▁ad ject ives , ▁and ▁closed ▁class ▁words ▁of ▁the ▁Mat is ▁language . ▁His ▁master ’ s ▁th esis ▁also ▁goes ▁over ▁morph os ynt actic ▁elements ▁of ▁Mat is ▁language . ▁The ▁paper ▁discuss es ▁various ▁classes ▁of ▁words , ▁the ▁order ▁of ▁constitu ents , ▁mar cation ▁of ▁the ▁erg ative ▁case , ▁and ▁general ▁them es ▁in ▁Mat is ▁syntax . ▁The ▁paper ▁builds ▁on ▁ph on ological ▁work ▁done ▁by ▁V . ▁Fer re ira ▁( 2 0 0 0 ). ▁ ▁A ▁master s