Pressure Sequence - A Novel Method of Protecting Smart Cards. - Neil James Henderson; Pieter H. Hartel (CARDIS, 2000)

iButton Enrolment and Verification Requirements for the Pressure Sequence Smartcard Biometric. - Neil James Henderson; Neil M. White; Pieter H. Hartel (E-smart, 2001)

Polymer thick film sensors for embedded smartcard biometrics and identity verification. - Neil James Henderson (2002)