Esdras Soares de Medeiros Filho Luiz Velho 0001 Hélio Lopes 0001 Restricted BPA: Applying Ball-Pivoting on the Plane. 372-379 2004 conf/sibgrapi/2004 SIBGRAPI https://doi.org/10.1109/SIBGRA.2004.1352983 https://doi.ieeecomputersociety.org/10.1109/SIBGRA.2004.1352983 db/conf/sibgrapi/sibgrapi2004.html#FilhoVL04