1. S. P. Finikov, Cartan’s Method of Exterior Forms inDifferentialGeometry. The Theory of Compatibility of Systems of Total and Partial Differential Equations (GITTL, Moscow–Leningrad, 1948) [in Russian].
2. M. A. Akivis and B. A. Rozenfel’d, Élie Cartan (MTsNMO, Moscow, 2007) [in Russian].
3. L. E. Evtushik, Yu. G. Lumiste, N. M. Ostianu, and A. P. Shirokov, Differential-geometric structures on manifolds, in Problems in Geometry, Vol. 9, Itogi Nauki i Tekhniki (VINITI, Moscow, 1979) [J. Soviet Math. 14 (6), 1573–1719 (1980)].
4. Yu. I. Shevchenko, “Laptev’s and Lumiste’s tricks for specifying a connection in a principal bundle,” Differ. Geom.Mnogoobr. Figur 37, 179–187 (2006).
5. A. A. Borisenko and Yu. A. Nikolaevskii, “Grassmannmanifolds and theGrassmann image of submanifolds,” UspekhiMat. Nauk 46 (2 (278)), 41–83 (1991) [RussianMath. Surveys 46 (2), 45–94 (1991)].