1. Bortz, J.E., A new mathematical formulation for strap-down inertial navigation, IEEE Transactions on Aerospace and Electronic Systems, 1971, AES-7(1), pp. 61–66.
2. Savage, P.G., Strapdown Analytics, Strapdown Associates, Inc., Maple Plain, Minnesota, 2007.
3. Savage, P.G., Computational Elements for Strapdown Systems. Low Cost Navigation Sensors and Integration Technology, RTO-EN-SET-116, NATO, Brussels, 2009.
4. Pontryagin, L.S., Obyknovennye differentsial’nye uravneniya (Ordinary Differential Equations), Moscow: Nauka, 1965.
5. Loitsyanskii, L.G., Kurs teoreticheskoi mekhaniki (Course of Theoretical Mechanics), Loitsyanskii, L.G. and Lur’e, A.I., Eds., vol. 1, Moscow: GITTL, 1957.