1. G. V. Shchipanov, Avtom. Telemekh., No. 1, 49–66 (1939).
2. G. V. Shchipanov, Gyroscopic Instruments for Blind Flight (Obrgiz, Moscow, 1938) [in Russian].
3. G. V. Shchipanov and Invariance Theory (Works and Documents), Ed. by Z. M. Lezina and V. I. Lezin (Fizmatlit, Moscow, 2004) [in Russian].
4. G. Basile and G. Marro, Sys. Control Lett. 9, 191–195 (1987).
5. B. M. Chen, I. M. Y. Mareels, Y. Zheng, and C. Zhang, Automatica 36, 1717–1724 (2000).