Your search returned the following 4 documents:

4. Computing Large Planar Regions in Terrains, with an Application to Fracture Surface
   Michiel Smid, Rahul Ray, Ulrich Wendt, and Katharina Lange
   Discrete Applied Mathematics 139 (1-3): 253-264, 2004
   
3. Surface Topography Quantification using Computational Geometry
   Ulrich Wendt, Katharina Lange, Rahul Ray, and Michiel Smid
   Poster presentation
   
2. Computing Large Planar Regions in Terrains
   Rahul Ray, MIchiel Smid, Katharina Lange, and Ulrich Wendt
   In: IWCIA 2001, 8th International Workshop on Combinatorial Image Analysis (IWCIA-01), Philadelphia, USA, 2002, 139-152
   [PS: Download: iwcia01.ps]
   
1. Surface Topography Quantification by Integral and Feature-related Parameters
   Ulrich Wendt, Katharina Lange, Michiel Smid, Rahul Ray, and Klaus-Dietz Tönnies
   Materialwissenschaft und Werkstofftechnik 33 (10): 621-627, 2002