@article{Neumann:2009,
author
=
"K.Neumann and S.Zontek",
title
=
"On geometry of the set of admissible quadratic estimators of quadratic functions of normal parameters",
journal
=
"Discussiones Mathematicae Probability and Statistics",
volume
=
"Vol. 26",
number
=
"no 2",
pages
=
"109--125",
year
=
"2006",
}