Ahmed Fawzi Otoom Óscar Pérez Concha Hatice Gunes Massimo Piccardi Mixtures of Normalized Linear Projections. 66-76 2009 ACIVS http://dx.doi.org/10.1007/978-3-642-04697-1_7 conf/acivs/2009 db/conf/acivs/acivs2009.html#OtoomCGP09