@article{articlec654ddde,
title   = {A population study of epigean and subterranean Potamolithus snails from southeast Brazil (Mollusca: Gastropoda: Hydrobiidae)},
author = {Bichuette, Maria Elina and Trajano, Eleonora},
year = {2003},
doi = {10.1023/b:hydr.0000007299.26220.b8},
journal   = {Hydrobiologia}
}