7Qin Zhang, John F Reid. Agricultural vehicle navigation using multiple guidance sensors[R]. Pittsburg,PA. 1999.
8Luca Caracciolo Alessandro De Luca. Trajectory tracking control of a four-wheel differentially driven mobile robot[A]. IEEE International Conference on Robotics & Automation[C]. Detroit, 1999,5:2632-2638.
9Benson E R. An evaluation of a geomagnetic direction sensor for vehicle guidance in precision agricultureapplications (M. S Thesis)[D]. Department of Agriculture Engineering, University of Illinois at Urbana-Champaign,1998.
10Will J T, Stombaugh S, Benson E. Development of a flexible platform for agricultural automatic guidance research[R]. ASAE Paper 988202. 1998.
