@Article{berger2007improving,
	author = {Berger, Christian R and Eisenacher, Michael and Zhou, Shengli and Jondral, Friedrich K},
	title = {Improving the UWB pulseshaper design using nonconstant upper bounds in semidefinite programming},
	journal = {IEEE J. Sel. Topics Signal Process.},
	volume = {1},
	number = {3},
	pages = {396–404},
	year = {2007},
}