1. A. Sandru, M. Badescu, L. Sandru, Reducing energy consumption through rational use of agricultural aggregates, Romanian Writing Publishing, Craiova, 1982.
2. N. N. Letosnev, Agricultural Machinery, State Agro-Forestry Publishing House, Bucharest, 1959.
3. C. Dobrescu, Optimization of parameters of the agricultural aggregates to reduce energy consumption, Editorial propaganda agricultural machinery, Bucharest, 1981.
4. A. Sandru, S. Popescu, I. Cristea, V. Neculăiasa, Exploitation of agricultural machinery, Didactic and Pedagogic Publishing House, Bucharest, 1983.
5. D. Toma, T. Neagu, I. Florescu, S. Lepşi, Agricultural Tractors, Didactic and Pedagogic Publishing House, Bucharest, 1978.