Algorithm for detecting images in defocused scenes using optical correlation. - Arturo Carnicer; Santiago Vallmitjana; Estela Martín-Badosa; Ignacio Juvells (ICIP (1), 1996)

Methods for Invariant Signature Classification. - Jordi-Roger Riba Ruiz; Arturo Carnicer; Santiago Vallmitjana; Ignacio Juvells (ICPR, 2000)