@article{articleddc62ee1,
title   = {Understanding conservation laws in mechanics: students conceptual change in learning about collisions},
author = {Tomasini, N G and Pecori-Bolandi, B and Pacca, Jesuína Lopes de Almeida and Villani, Alberto},
year = {1993},
doi = {10.1002/sce.3730770206},
journal   = {Science Education}
}