1. Suiting the plough body shape to higher speeds;Söhne;Grundlagen der Landtechnik,1960
2. Collected Works Sel'knozgiz;Goryachkin,1940
3. Tractionability as a function of soil moisture;Voorhees;Trans. ASAE,1977
4. The empirical prediction of tractor-implement field performance;Gee-Clough;NIAE Dept Note No. DN/T/809/01006,1977
5. The use of methods of theory of dimensional analysis for the evaluation of the draft characteristics of the plow during operation in different conditions;Krastin;Nat. Tillage Lab. Trans. No. 333,1973