@article {Trans_Info_Theory_2010_QuaternionWL,
	title = {Properness and Widely Linear Processing of Quaternion Random Vectors},
	journal = {IEEE Transactions on Information Theory},
	volume = {56},
	number = {7},
	year = {2010},
	month = {July},
	pages = {3502{\textendash}3515},
	author = {V{\'\i}a, Javier and Ram{\'\i}rez, David and Santamar{\'\i}a, Ignacio}
}
