@inproceedings{inproceedings8bb61dd5,
title   = {Quasar pairs as tracers of high density environments at z'da ordem de'1},
author = {Sodré Júnior, Laerte and Boris, N. V and Cypriano, E.S and Santos, W. A and Mendes de Oliveira, Cláudia and West, M},
year = {2007},
publisher = {International Astronomical Union},
booktitle   = {Reunión Regional latioamerica de Astronomía de la IAU}
}