@article{Kowal:2009,
author
=
"M.Kowal and S.Kowalski",
title
=
"Material constants for wet pine sapwood",
journal
=
"Studia Geotechnica et Mechanica",
volume
=
"Vol. 20",
number
=
"no 3-4",
pages
=
"39--52",
year
=
"1998",
}