[1] J. Janyška: On natural operations with linear connections. Cz. Math. Journal, 35 (110) 1985, 106-115. MR 0779339

[2] I. Kolář: On some operations with connections. Math. Nachr., 69 (1975), 297-306. MR 0391157

[3] I. Kolář: Connections in 2-fibered manifolds. Arch. Math. (Brno), XVII (1981), 23-30. MR 0672485

[4] S. Kobayashi K. Nomizu: Foundations of Differential Geometry, I. New York-London-Sydney 1963.

[5] P. Libermann: Connexions d'ordre superieur et tenseur de structure. Atti del Convegno Int. di Geom. Diff., Bologna 1967, 1-18.

[6] L. Mangiarotti M. Modugno: New operators on jet spaces. Annales Fac. des Sciences Toulouse, 5 (1983), 171 -198. MR 0735661

[7] V. Oproiu: Connections on the semiholonomic frame bundle of the second order. Revue Roumaine Mat. Pures et Appliq., XIV (1969), 661-672. MR 0248671

[8] J. Pradines: Fibrés vectoriels double symétriques et jets holonomes d'ordre 2. C. R. Acad. Sci. Paris Sér. A, 278 (1974), 1557-1560. MR 0388433

[9] A. K. Rybnikov: On the second order affine connections. (Russian), Mat. Zametki 29 (1981), 279-290. MR 0610586

[10] I. Vadovičová: Non-holonomic jets of the second order and their applications. (Slovak), PhD-thesis, Žilina 1983.

[11] P. C. Yuen: Higher order frames and linear connections. Cahiers Topol. Geom. Diff., 12 (1971), 337-371. MR 0307102 | Zbl 0222.53033