1. Doupovec, M., Mikulski, W. M.: Reduction theorems for principal and classical connections. Acta Math. Sinica 26 (1) (2010), 169–184. DOI 10.1007/s10114-010-7333-2
2. Gancarzewicz, J.: Horizontal lifts of linear connections to the natural vector bundles. Differential geometry (Santiago de Compostela, 1984), vol. 131, Pitman, Boston, MA, 1985, pp. 318–341.
3. Janyška, J., Vondra, J.: Natural principal connections on the principal gauge prolongation of a principal bundle. Rep. Math. Phys. 64 (3) (2009), 395–415. DOI 10.1016/S0034-4877(10)00002-9
4. Kolář, I.: Induced connections on total spaces of fibred bundles. Int. J. Geom. Methods Mod. Phys. (2010), 705–711. DOI 10.1142/S021988781000452X
5. Kolář, I., Michor, P. W., Slovák, J.: Natural Operations in Differential Geometry. Springer Verlag, 1993.