@inproceedings{inproceedings3307bf25,
title   = {Study of the Doppler Broadening of positron Annihilation Radiation with use of an Angular Filter},
author = {Mariano, Leandro and Helene, Otaviano Augusto Marcondes},
year = {2009},
publisher = {SBF},
booktitle   = {Encontro Nacional de Física da Matéria Condensada}
}