Edge information at landmarks in medical images. - Fred L. Bookstein; William D. K. Green (VBC, 1992)

A Feature Space for Derivatives of Deformations. - Fred L. Bookstein; William D. K. Green (IPMI, 1993)

A feature space for edgels in images with landmarks. - Fred L. Bookstein; William D. K. Green (J. Math. Imaging Vis., 1993)

Edgewarp: a flexible program package for biometric image warping in two dimensions. - Fred L. Bookstein; William D. K. Green (VBC, 1994)