Kopal, Z. (1960). Figures of equilibrium of celestial bodies: With emphasis on problems of motion of artificial satellites. University of Wisconsin Press.
Chicago-referens (17:e uppl.)Kopal, Zdeněk. Figures of Equilibrium of Celestial Bodies: With Emphasis on Problems of Motion of Artificial Satellites. Madison: University of Wisconsin Press, 1960.
MLA-referens (8:e uppl.)Kopal, Zdeněk. Figures of Equilibrium of Celestial Bodies: With Emphasis on Problems of Motion of Artificial Satellites. University of Wisconsin Press, 1960.
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