@article{article9e483050,
title   = {Linguistic issues in the development of ReGra: a grammar checker for brazilian portuguese},
author = {Martins, R. T. and Hasegawa, R. and Nunes, Maria das Graças Volpe and Montilha, Gisele and Oliveira Junior, Osvaldo Novais de},
year = {1998},
doi = {10.1017/s135132499800206x},
journal   = {Natural Language Engineering}
}