@inproceedings{inproceedings19d5d6e4,
title   = {Longs versus shorts in the options market at the São Paulo stock exchange},
author = {Sanvicente, Antonio Zoratto and Monteiro, Rogério da Costa},
year = {2004},
publisher = {Universidad de Santiago de Chile},
booktitle   = {Encuentro Internacional de Finanzas}
}