1. Recommended Test Procedures for GPS Receivers. ION STD 101;Anonym,1997
2. Anonym, 2007. X587 Dynamic Testing of Satellite - Based Positioning Devices used in Agriculture. ASABE Precision Agriculture Committee (PM-54) Draft 10, ASABE, St. Joseph, Michigan, USA.
3. Anonym, 2010. Tractors and machinery for agriculture and forestry – Test procedures for positioning and guidance systems in agriculture – Part 1: Dynamic testing of satellite-based positioning devices. ISO standard 12188, ISO.
4. The NMEA 0183 Protocol;Betke,2000
5. Centimetre-precision guidance of moving implements in the open field: a simulation based on GPS measurements;Dijksterhuis;Comput. Electron. Agric.,1998