Your search returned the following 3 documents:

3. On the minimum corridor connection and other generalized geometric problems
   Hans L. Bodlaender, Corinne Feremans, Alexander Grigoriev, Eelko Penninkx, Rene Sitters, and Thomas Wolle
   In: 4th Workshop on Approximation and Online Algorithms, WAOA, Zurich, Switzerland, 2006, 69-82
   
2. Approximation schemes for packing splittable items with cardinality constraints
   Leah Epstein and Rob van Stee
   In: Approximation and Online Algorithms, 5th International Workshop, WAOA 2007, Eilat, Israel, 2008, 232-245
   [PS: Download: cards-j.ps]
   
1. On the Online Unit Clustering Problem
   Leah Epstein and Rob van Stee
   In: Approximation and Online Algorithms, 5th International Workshop, WAOA 2007, Eilat, Israel, 2008, 193-206
   [Download: unitj3.dvi]