1. Compaction in the subsoil;Danfors,1974
2. Jordpackning-markstruktur-gröda;Eriksson,1974
3. The Effect of Soil Compaction on Soil Structure and Crop Yields;Kristian Aase,1975
4. A method for characterizing the state of compactness of the plough layer;Håkansson;Soil Tillage Res.,1990
5. Effects of heavy traffic on soil conditions and crop growth;Håkansson,1981