Retinal Blood Vessel Extraction by Using Multi-resolution Matched Filtering and Directional Region Growing Segmentation. - Mitsutoshi Himaga; David Usher; James F. Boyce (MVA, 2002)

Accurate Retinal Blood Vessel Segmentation by Using Multi-Resolution Matched Filtering and Directional Region Growing. - Mitsutoshi Himaga; David Usher; James F. Boyce (IEICE Trans. Inf. Syst., 2004)

Video Surveillance for Biometrics: Long-Range Multi-biometric System. - Faisal I. Bashir; David Usher; Pablo Casaverde; Marc Friedman (AVSS, 2008)

Simultaneous Capture of Iris and Retina for Recognition. - David Usher; Yasunari Tosa; Marc Friedman (Encyclopedia of Biometrics, 2009)

Simultaneous Capture of Iris and Retina for Recognition. - David Usher; Yasunari Tosa; Marc Friedman (Encyclopedia of Biometrics, 2015)