1. Mueller, I.I.: Spherical and practical astronomy as applied to geodesy. Ungar, New York (1969).
2. Ramsayer, K.: Geodätische Astronomie, Jordan/Eggert/Kneissl, Handbuch der Vermessungskunde, Bd. IIa. Metzler, Stuttgart (1970).
3. Tardi, P., Laclavére, G.: Traité de géodésic, Tome II, Astronomie géodésique de position. Gauthier-Villars, Paris (1955).
4. Woolard, E.W., Clemence, G.M.: Spherical astronomy. Academic Press, New York and London (1966).
5. Nautical Almanac Offices of the United Kingdom and the United States of America: Explanatory Supplement to the Astronomical Ephemeris and the American Ephemeris and Nautical Almanac, third impression (with amendments). H. M. Stationary Office, London (1974).