1. Characterizations of three-dimensional holes;Bertrand,1992
2. On the computation of topological numbers;Bertrand,1994
3. A Boolean characterization of three-dimensional simple points;Bertrand;Pattern Recognition Lett.,1995
4. A 3D thinning algorithm using subfields;Bertrand,1994
5. A new topological classification of points in 3D images;Bertrand,1992