1. Tillage energy of a vibrating tillage tool;Hendrick;ASAE Trans.,1963
2. Kinematics and power requirements of oscillating tillage tools;Kofoed;J. agric. Engng Res.,1969
3. Oscillating soil tools—a review;Verma;ASAE Trans.,1971
4. Oscillating soil tools—a review;Verma;ASAE Trans.,1971
5. Dynamical Destruction of Soils;Baladiusky,1971