Sehnal, Ladislav
Dynamics of a near-Earth artificial satellite.
Dynamics and Astronomy of Natural and Artificial Celestial Bodies. Poznaň: University of Poznaň, 1994 - (Kurzynska, K.; Barlier, F.; Seidelman, P.; Wytrzyszczak, I.), s. 325-332
http://hdl.handle.net/11104/0021856