1. Recent findings in the field and laboratory on the integrity and durability of prefab drains;Kremer,1983
2. The guarantee of the quality of vertical drainage systems;Veldhuijzen Van Zanten,1986
3. Flow behaviour of kinked strip drains;Lawrence,1988
4. Research activities on vertical drainage in the Netherlands;Oostveen,1986
5. A study on some factors affecting the performance of prefabricated band-shaped vertical drains;Yong,1989