67: References
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- Elroy M. Avery, School Physics (Sheldon and Co., New York, 1895).
- William E. Boyce and Richard C. DiPrima, Elementary Differential Equations and Boundary Value Problems (3rd ed.) (Wylie, New York, 1977).
- J.L. Comstock, M.D., A System of Natural Philosophy: In Which Are Explained the Principles of Mechanics, Hydrostatics, Hydraulics, Pneumatics, Acoustics, Optics, Astronomy, Electricity, Magnetism, Steam-Engine, Electro-Magnetism, Electrotype, Photography, and Daguerreotype; to Which Are Added Questions for the Examination of Pupils Designed for the Use of Schools and Academies (Farmer, Brace, \& Co., New York, 1857).
- Denis, C., Schreider, A.A., Varga, P., Z’avoti, J.: 2002, J. Geodyn., 34, 667 (2002).
- "Length of the day and evolution of the Earths core in the geological past", Denis, C., Rybicki, K.R., Schreider, Tomecka-Suchoń, S., and Varga, P., Astron. Nachr., AN 332, No. 1, 24-35 (2011).
- E. Gelin, Éléments de Trigonométrie plane et sphérique à l'usage des élèves des Cours professionnels des candidats aux Écoles spéciales des Universités et à l'École militaire de Bruxelles (1888).
- Georgia State University HyperPhysics project, \href{http://hyperphysics.phy-astr.gsu.edu...astr.gsu.edu/} hbase/hframe.html.
- H. Goldstein, Classical Mechanics (2nd ed.) (Addison-Wesley, Reading Mass., 1980).
- V. I. Hallock, I.C.S. Reference Library (International Textbook Company, Scranton Penn., 1905) 7:11.
- John Leslie, The Philosophy of Arithmetic; Exhibiting a Progressive View of the Theory and Practice of Calculation, with Tables for the Multiplication of Numbers as Far as One Thousand. Abernethy \& Walker, Edinburgh, 1820.
- L.L. Simpson, private communication.
- S.W. McCuskey, Introduction to Celestial Mechanics (Addison-Wesley, Reading, Mass., 1963).
- Charles Morris, Winston's Cumulative Loose-Leaf Encyclopedia Volume V (Philadelphia: The John C. Winston Company, 1918.)
- A. Privat-Deschanel, Elementary Treatise on Natural Philosophy (D. Appleton and Co., New York, 1884).
- U.S. Standard Atmosphere, 1976. NOAA/NASA/USAF (U.S. Government Printing Office, Stock No. 003-017-00323-0, 1976.)
- Varga, P., Denis, C., and Varga, T., J. Geodyn., 25, 61 (1998).
- Taffel, Alexander, Visualized Physics, Oxford Book Co., New York, 1955.
- D.A. Wells, The Science of Common Things; A Familiar Explanation of the First Principles of Physical Science (1857).