Generalized Scale-Selection. - Jon Sporring; Christos I. Colios; Panos E. Trahanias (ICIP, 2000)

Landmark Identification Based on Projective and Permutation Invariant Vectors. - Christos I. Colios; Panos E. Trahanias (ICPR, 2000)

A framework for visual landmark identification based on projective and point-permutation invariant vectors. - Christos I. Colios; Panos E. Trahanias (Robotics Auton. Syst., 2001)