@article{NSJOM_1999_29_3a_6,
     author = {I. 

 Bucataru},
     title = {The 

 {Jacobi} fields for a spray on the tangent hnndle},
     journal = {Novi Sad Journal of Mathematics},
     pages = {69-78},
     publisher = {mathdoc},
     volume = {29},
     number = {3},
     year = {1999},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1999_29_3a_6/}
}