1. Kelly, R. D., & Richman, G. (1969). Principles and techniques of shock data analysis. SVM-5. Washington: The Shock and Vibration Information Center, United States Department of Defense.
2. Franklin, G., Powell, J., & Workman, M. (1990). Digital control of dynamic systems (2nd ed.). Boston: Addison-Wesley Longman Publishing.
3. Smallwood, D. (1981). An improved recursive formula for calculating shock response spectra. In 51st Shock and Vibration Bulletin (Vol. 51, No. 2, pp. 211–217).
4. ISO 18431-4. (2007). Mechanical vibration and shock — Signal processing — Part 4: Shock-response spectrum analysis. Geneva: International Standard.
5. Smallwood, D. (2005). Derivation of the ramp invariant filter for shock response spectrum calculations. In Proceedings of the 76th Shock and Vibration Symposium.