@inproceedings{inproceedingse1b21d28,
title   = {Preliminary cladistic analysis of Middle Pennsylvainan productids from the Itaituba (Amazon Basin) and Piaui (Parnaiba Basin) formations},
author = {Anelli, Luiz Eduardo and Lucio, Mauricio Pettinato},
year = {1999},
publisher = {Banco do Nordeste},
booktitle   = {Congresso Brasileiro de Paleontologia}
}