1. Simple points, topological numbers and geodesic neighborhoods in cubic grids;Bertrand;Pattern Recognition Lett.,1994
2. G. Bertrand, On P-simple points, in: Compte Rendu de l'Académie des Sciences de Paris (Computer Science/Theory of Signals), Vol. 321, Série I, 1995, pp. 1077–1084.
3. G. Bertrand, P-simple points: a solution for parallel thinning, in: Actes du 5ème Colloque DGCI, Clermont-Ferrand, France, 1995, pp. 233–242.
4. G. Bertrand, Sufficient conditions for 3D parallel thinning algorithms, in: Vision Geometry IV, Vol. 2573, SPIE, Bellingham, WA, San Diego, CA, USA, 1995, pp. 52–60.
5. G. Bertrand, Z. Aktouf, A three-dimensional thinning algorithm using subfields, in: Vision Geometry III, Vol. 2356, SPIE, Bellingham, WA, Boston, MA, USA, 1994, pp. 113–124.