Your search returned the following 2 documents:

2. Interactive Ray Tracing of Point-based Models
   Ingo Wald and Hans-Peter Seidel
   In: Symposium on Point-Based Graphics, Stony Brook, USA, 2005, 9-16
   
1. Robust Filtering of Noisy Scattered Point Data
   Oliver Schall, Alexander Belyaev, and Hans-Peter Seidel
   In: IEEE/Eurographics Symposium on Point-Based Graphics, Stony Brook, New York, USA, 2005, 71-77
   [PDF: Download: RobustFiltering.pdf]