[1] Bácsó S., Verhócki L.: E1-planar mappings on spaces of affine connection without torsion. Publ. Math. 37, 1-2 (1990), 131-136. MR 1063665

[2] Fomin V. E.: On differential geometry with infinite dimension. Trudy Sem. Kaf. Geometrii, 7, Kazan’, Kazan’sk. gos. Univ. (1974). MR 0400284

[3] Fomin V. E.: On the infinite dimensional space of constant curvature. Trudy Sem. Kaf. Geometrii, 8, Kazan’, Kazan’sk. gos. Univ. (1975). MR 0431250

[4] Levi-Civita T.: Sulle transformationi delle equazioni dinamiche. Ann. Mat. Milano 24, 2 (1896), 255-300.

[5] Mikeš J.: On F- and f-planar mappings, transformations, and deformations. Geom. of Generalized Spaces, Penza (1992), 60-65 MR 1265508

[6] Mikeš J.: Geodesic mappings of affine-connected and Riemannian spaces. J. of Math. Sci., New York, 1996. MR 1384327 | Zbl 0866.53028

[7] Sinyukov N. S.: Geodesic mapping of Riemannian spaces. Nauka, Moscow, 1979. MR 0552022

[8] Yano K.: Union curves and subpaths. Math, J., 1 (1948), 51-59. MR 0028090 | Zbl 0041.09501