1. Die Störung von Pendul- und Kreiselapparaten durch die Beschleunigung der Fahrzeuges;SCHULER;Physikal Z.,1923
2. Practical Problems of Inertial Navigation;DRAPER,1958
3. WRIGLEY, WALTER, WOODBURY, R. B. and HOVORKA, JOHN, Inertial Guidance, Institute of the Aeronautical Sciences S.M.F. Fund Paper No. FF-16, New York, January 1957.
4. DRAPER, C. S. and WOODBURY, R. B., Geometrical Stabilization Based on Servodriven Gimbals and Integrating Gyro Units (AGARD Symposium Paper, Venice, Italy) Massachusetts Institute of Technology, Instrumentation Laboratory, Cambridge Massachusetts, 1956.
5. A Frequency Standard for Use at High and Low Frequency;MCLOUGHLIN;J. Amer. Acoust. Soc.,1945