1. C. Agostinelli, Lezioni de Meccanica Superiore. 1. Meccanica Analitica (Torino, V. Giorgio, 1948).
2. P. Capodanno, ‘Sur deux extensions d'un théorème de Levi-Civita aux systèmes gyroscopiques et quelques applications’, Journal de Mécanique, Vol. 17, no. 3 (1978), 433–454.
3. M. Dovletov & M. F. Sul'gin, ‘Particular solutions of dynamic equations with impulse factors of G. K. Suslov’, Taškent. Gos. Univ. Naučn. Vyp. 397 (1971), 60–66.
4. Q. K. Ghori & M. Hussain, ‘Generalisation of the Hamilton-Jacobi theorem’, Z. Angew. Math. Phys. 25 (1974), 536–640.
5. Q. K. Ghori, ‘Equations of motion in Poincaré-Četaev variables with constraint multipliers’, Bull. Austral. Math. Soc., Vol. 14, no. 3 (1976), 359–369.