@article{Piątek:2009,
author
=
"K.Piątek and W.Leoński",
title
=
"Wehrl's entropy and a mesure of intermode correlations in phase space",
journal
=
"Journal of Physics A : Mathematical and General",
volume
=
"Vol. 34",
pages
=
"4951--4967",
year
=
"2001",
}