1. Formulation of forced vibration of tree limbs with secondary branches;Phillips,1968
2. Die Mechanisierung der Ernte von Stein und Stein und Struachbeerenobst;Von Hardenberg,1967
3. Motion of pendular fruit systems during vertical vibration;Studer,1966
4. Effect of shaker type and direction of shake on apple detachment;Garman,1970
5. Forced vibration of a tree limb;Adrian,1963