Biometrie permanence: Definition and robust calculation. - John Harvey; John Campbell 003; Stephen J. Elliott; Michael Brockly; Andy Adler (SysCon, 2017)

Characterization of Biometric Template Aging in a Multiyear, Multivendor Longitudinal Fingerprint Matching Study. - John Harvey; John Campbell 003; Andy Adler (IEEE Trans. Instrum. Meas., 2019)