Geogrids
	The effect of geogrids under unbound sub-base layers J. Retzlaff, Colbond Geosynthetics GmbH U. Turczynski, University of Applied Sciences Anhalt, Germany S. Schwerdt, Ingenieure Dr. Köhler & Kirschstein GmbH Germany Proceedings of the 8th International Conference on Geosynthetics, Yokohama, Japan; 18-22 September 2006
	Comparison of designs based on standard tests with on site measurements of the reinforcement effect of geogrids in executed road projects J. Retzlaff, Colbond Geosynthetics GmbH, Germany W. Voskamp, Colbond bv, Arnhem, The Netherlands Proceedings of the 8th International Conference on Geosynthetics, Yokohama, Japan; 18-22 September 2006
	Swing-up in creep curves at high loadings of PET bars - further proof of the molecular chain change model J. Retzlaff, Colbond Geosynthetics GmbH, Germany W. Voskamp, Colbond bv, Arnhem, The Netherlands Proceedings of the 8th International Conference on Geosynthetics, Yokohama, Japan; 18-22 September 2006
	Current approaches to the determination of the design stiffness and strength of polymeric biaxial geogrids Prof. Alan McGown & Jan Kupec MSc, University of Strathclyde, Glasgow, UK Dr Georg Heerten, Naue Fasertechnik, Lübbecke, Germany Wim Voskamp MSc, Colbond, Arnhem, The Netherlands Proceedings of the 28th "Baugrundtagung", Leipzig, Germany; 22+23 September 2004
	Properties of the new laser welded geogrid made of extruded bars Jan-Maarten Elias, Colbond Proceedings of the Second European Geosynthetics Conference, EuroGeo 2, Bologna, Italy; 15-18 October, 2000
	Predicting the long-term strength of a geogrid using the stepped isothermal method J.H. Greenwood, ERA Technology Ltd., Leatherhead, United Kingdom Wim Voskamp, Colbond Proceedings of the Second European Geosynthetics Conference, EuroGeo 2, Bologna, Italy; 15-18 October 2000