Aitor Olano Aureli Soria-Frisch Rodrigo Verschae Robust skin detection based on the fuzzy integral. 1135-1140 2005 EUSFLAT Conf. http://www.eusflat.org/publications/proceedings/EUSFLAT-LFA_2005/papers/JEL186.pdf conf/eusflat/2005 db/conf/eusflat/eusflat2005.html#OlanoSV05