@article {61809,
	title = {The numerical range of elementary operators II},
	journal = {Linear Algebra and its ApplicationsLinear Algebra and its Applications},
	volume = {338},
	year = {2001},
	month = {2001},
	pages = {239-244},
	isbn = {0024-3795},
	author = {Seddik, Ameur}
}
