@article {albert2007derivativeinformation,
	title = {Derivative of BICM mutual information},
	journal = {IET Electronics Letters},
	volume = {43},
	year = {2007},
	note = {Preprint at: http://arxiv.org/abs/0708.2026},
	month = {Oct},
	pages = {1219{\textendash}1220},
	issn = {0013-5194},
	doi = {10.1049/el:20072376},
	author = {Guill{\'e}n i F{\`a}bregas, Albert and Martinez, Alfonso}
}
