• Manuel Abellanas, Ferran Hurtado, Christian Icking, Lihong Ma, Belén Palop, Pedro A. Ramos
  Best Fitting Rectangles
  Technical Report 322, FernUniversität Hagen, Department of Computer Science, Germany, 2004.

• Manuel Abellanas, Ferran Hurtado, Christian Icking, Lihong Ma, Belén Palop, Pedro A. Ramos
  Best Fitting Rectangles
  Abstracts 19th European Workshop Comput. Geom., Bonn, Universität Bonn, 2003, pp. 147-150.

• Manuel Abellanas, Ferran Hurtado, Vera Sacristán, Christian Icking, Lihong Ma, Rolf Klein, Elmar Langetepe, Belén Palop
  Voronoi Diagrams for Services Neighboring a Highway
  Inform. Process. Lett. 86, pp. 283-288, 2003.

• Christian Icking, Rolf Klein, Peter Köllner, Lihong Ma
  Java Applets for the Dynamic Visualization of Voronoi Diagrams
  In Computer Science in Perspective, edited by Rolf Klein, Hans-Werner Six, Lutz Wegner, Lecture Notes Comput. Sci. 2598, Springer-Verlag, 2003, pp. 191-205.

• Christian Icking, Rolf Klein, Peter Köllner, Lihong Ma
  Java Applets for the Dynamic Visualization of Voronoi Diagrams
  Technical Report 297, FernUniversität Hagen, Department of Computer Science, Germany, 2002.

• Manuel Abellanas, Ferran Hurtado, Christian Icking, Rolf Klein, Elmar Langetepe, Lihong Ma, Belén Palop, Vera Sacristán
  Smallest Color-Spanning Objects
  Technical Report 283, FernUniversität Hagen, Department of Computer Science, Germany, 2001.

• Manuel Abellanas, Ferran Hurtado, Christian Icking, Rolf Klein, Elmar Langetepe, Lihong Ma, Belén Palop, Vera Sacristán
  The Farthest Color Voronoi Diagram and Related Problems
  Abstracts 17th European Workshop Comput. Geom., Berlin, Freie Universität Berlin, 2001, pp. 113-116.

• Manuel Abellanas, Ferran Hurtado, Christian Icking, Rolf Klein, Elmar Langetepe, Lihong Ma, Belén Palop, Vera Sacristán
  Smallest Color-Spanning Objects
  Proc. 9th Annu. European Sympos. Algorithms,
  Lecture Notes Comput. Sci. 2161, Springer-Verlag, 2001, pp. 278-289.

• Christian Icking, Rolf Klein, Lihong Ma, Stefan Nickel, Ansgar Weißler
  On Bisectors for Different Distance Functions
  Discrete Appl. Math. 109, pp. 139-161, 2001.

• Christian Icking, Lihong Ma
  A Tight Bound for the Complexity of Voronoi Diagrams under Polyhedral Convex Distance Functions in 3D
  Proc. 33rd Annu. ACM Sympos. Theory Comput., Crete, Greece, 2001, pp. 316-321.

• Manuel Abellanas, Ferran Hurtado, Christian Icking, Rolf Klein, Elmar Langetepe, Lihong Ma, Belén Palop, Vera Sacristán
  Diagrama de Voronoi del color más lejano y problemas relacionados
  Actas de los IX Encuentros en Geometría Computacional, Girona, Institut d'Informática i Aplicacions, Universitat de Girona, 2001, pp. 51-54.

• Manuel Abellanas, Ferran Hurtado, Christian Icking, Rolf Klein, Elmar Langetepe, Lihong Ma, Belén Palop, Vera Sacristán
  Proximity Problems for Time Metrics Induced by the L1 Metric and Isothetic Networks
  Actas de los IX Encuentros en Geometría Computacional, Girona, Institut d'Informática i Aplicacions, Universitat de Girona, 2001, pp. 175-181.

• Christian Icking, Lihong Ma
  A Tight Bound for the Complexity of Voronoi Diagrams under Polyhedral Convex Distance Functions in 3D
  Technical Report 277, FernUniversität Hagen, Department of Computer Science, Germany, 2000.

• Lihong Ma
  Bisectors and Voronoi Diagrams for Convex Distance Functions
  Dissertation, FernUniversität Hagen, Department of Computer Science, Technical Report 267, 2000.

• Christian Icking, Rolf Klein, Ngoc-Minh Lê, Lihong Ma, Francisco Santos
  On Bisectors for Convex Distance Functions in 3-Space
  Technical Report 250, FernUniversität Hagen, Department of Computer Science, Germany, 1999.

• Christian Icking, Rolf Klein, Ngoc-Minh Lê, Lihong Ma, Francisco Santos
  On Bisectors for Convex Distance Functions in 3-Space
  Proc. 11th Canad. Conf. Comput. Geom., Vancouver, Canada, 1999.

• Christian Icking, Rolf Klein, Lihong Ma, Stefan Nickel, Ansgar Weißler
  On Bisectors for Different Distance Functions
  Proc. 15th Annu. ACM Sympos. Comput. Geom., 1999, pp. 291-299.

• Christian Icking, Rolf Klein, Lihong Ma, Stefan Nickel, Ansgar Weißler
  On Bisectors for Different Distance Functions
  Technical Report 237, FernUniversität Hagen, Department of Computer Science, Germany, 1998.

• Christian Icking, Rolf Klein, Lihong Ma
  The Bisector with Respect to Different Convex Distance Functions
  Abstracts 14th European Workshop Comput. Geom., Barcelona, Universitat Polytènica de Catalunya, Barcelona, 1998, pp. 99-101.

• Christian Icking, Rolf Klein, Peter Köllner, Lihong Ma
  A Java Applet for the Dynamic Visualization of Voronoi Diagrams
  Abstracts 13th European Workshop Comput. Geom., Würzburg, Universität Würzburg, 1997, pp. 46-47.

• Christian Icking, Rolf Klein, Ngoc-Minh Lê, Lihong Ma
  Convex Distance Functions in 3-Space are Different
  Fundam. Inform. 22, pp. 331-352, 1995.

• Rolf Klein, Lihong Ma
  Wrapping Ellipses Around a Convex Skeleton
  Internat. J. Comput. Math. 55, pp. 173-181, 1995.

• Christian Icking, Rolf Klein, Lihong Ma
  An Optimal Competitive Strategy for Looking Around a Corner
  Technical Report 167, FernUniversität Hagen, Department of Computer Science, Germany, 1994.

• Christian Icking, Rolf Klein, Ngoc-Minh Lê, Lihong Ma
  Convex Distance Functions in 3-Space are Different
  Proc. 9th Annu. ACM Sympos. Comput. Geom., 1993, pp. 116-123.

• Christian Icking, Rolf Klein, Lihong Ma
  How to Look Around a Corner
  Proc. 5th Canad. Conf. Comput. Geom., Waterloo, Canada, 1993, pp. 443-448.

• Christian Icking, Rolf Klein, Lihong Ma
  The Optimal Way for Looking Around a Corner
  Proc. 4th IEEE-IEE Vehicle Navigation and Informations Systems Conference, Ottawa, Canada, 1993.

• Christian Icking, Rolf Klein, Ngoc-Minh Lê, Lihong Ma
  Convex Distance Functions in 3-space are Different
  Technical Report 133, FernUniversität Hagen, Department of Computer Science, Germany, 1992.

• Rolf Klein, Lihong Ma
  Wrapping Ellipses Around a Convex Skeleton
  Technical Report 132, Fachbereich Informatik, FernUniversität Hagen, Germany, 1992.

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