Ballell Pages, Lluis; Castro Pichel, Julia; Fernandez Menendez, Raquel; Fernandez Velando, Esther Pilar; Gonzalez Del Valle, Silvia; Leon Diaz, Maria Luisa; Mendoza Losana, Alfonso; Wolfendale, Matthew James Patent: US2012/95064 A1, 2012 ; Location in patent: Page/Page column 38 ;