@inproceedings{inproceedingsbc7bbf86,
title   = {Image analysis for the determination of roundness and sphericity grades of sandy grains},
author = {Zanchetta, Liz de Mello and Soares, Lindolfo and D'Agostino, Luiz Fernando},
year = {2004},
publisher = {ICAM},
booktitle   = {International Congress on Applied Mineralogy}
}