@inproceedings{inproceedings42a18e32,
title   = {Tutoring system for discovering plane geometry using tangram},
author = {Mendes, Maria Dolores Ceccato and Nunes, Maria das Graças Volpe and Turine, M A S},
year = {1994},
publisher = {Aace},
booktitle   = {International Symposium on Mathematics, Science Education and Technology}
}