J P Celis

Dynamic frictional behaviour of orthodontic archwires and brackets.

G Willems, G. Willems, J. Celis, 2004, European journal of orthodontics.

Frictional behavior of stainless steel bracket-wire combinations subjected to small oscillating displacements.

G Willems, G. Willems, J. Celis, 2001, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

Chemical Characterization of the Resin-Dentin Interface by Micro-Raman Spectroscopy

B Van Meerbeek, P Lambrechts, M Braem, 1993, Journal of dental research.

A classification of dental composites according to their morphological and mechanical characteristics.

G Willems, P Lambrechts, M Braem, 1992, Dental materials : official publication of the Academy of Dental Materials.