1. Druckverteilung in Baugrunde (Pressure distribution in the soil);Froehlich,1934
2. Druckverteilung in Boden und Bodenverformung unter schlepperreifen;Soehne;Grundl. Landtech.,1953
3. Fundamentals of pressure distribution and soil compaction under tractor tires;Soehne;Agric. Engng,1958
4. Fundamentals of pressure distribution and soil compaction under tractor tires;Soehne;Agric. Engng,1958
5. Fundamentals of pressure distribution and soil compaction under tractor tires;Soehne;Agric. Engng,1958