@article{Gnot:2009,
author
=
"S.Gnot and A.Urbańska-Motyka and R.Zmyślony",
title
=
"Nonnegative maximum likelihood estimation in a linear model of variance components",
journal
=
"Discussiones Mathematicae : Algebra and Stochastic Methods",
volume
=
"Vol. 17",
number
=
"no 2",
pages
=
"215--224",
year
=
"1997",
}