1. European Commission . GALILEO, Involving Europe in a New Generation of Satellite Navigation Services.Communication 54, Brussels, February 9. http://europa.eu.int/abc/doc/off/bull/en/9901/pl03169.htm,1999.
2. Belgian EU Presidency. European Council of Laeken,Presidency Conclusions, Laeken, December 14-15. http://europa.eu.int/abc/doc/off/buiyen/200112/il013.htm, 2001.33.
3. Weber T, Trautenberg H Schäfer C. GALILEO System Architecture-Status and Concepts.Proc of ION GPS, Salt Lake City, September, 2001.
4. Benedicto J, Dinwiddy S, Gatti G,et al. GALILEO: Satellite Design and Technology Developments. European Space Agency, Noordwijk, November 2000.
5. Hein G, Godet J, Issler J,et al. The Galileo Frequency Structure and Signal Design.Proc of ION GPS 2001, Salt Lake City, September 2001. 1273–1282.