@article{Tran Quoc:2009,
author
=
"V.Tran Quoc and T.Nguyen Khac and L.Nguyen Thi",
title
=
"Vietnam freshwater environment",
journal
=
"Civil and Environmental Engineering Reports : University of Zielona Góra Press ; Zielona Góra",
volume
=
"no 2",
pages
=
"81--92",
year
=
"2007",
}