TY JOUR TI POWER EFFICIENCY GENETIC PROGRAMMING OF MACHINE AND TRACTOR UNIT FUNCTIONING KW efficiency KW power inputs KW machine and tractor unit KW optimizing task KW criterion KW target functions KW genetic algorithms KW methods JO Bulletin of KSAU AU Tsuglenok, N.V. AU Zhuravlyov, S.Y. PY 2013 IS PB Krasnoyarsk State Agrarian University