@article{701646,
     title = {Jacobi vector fields and geodesic tubes in certain K\"ahler manifolds},
     booktitle = {Proceedings of the 19th Winter School "Geometry and Physics"},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {2000},
     pages = {43-52},
     mrnumber = {MR1758077},
     zbl = {0979.53062},
     url = {http://dml.mathdoc.fr/item/701646}
}

Arvanitoyeorgos, Andreas; Beneki, Christina. Jacobi vector fields and geodesic tubes in certain Kähler manifolds, dans Proceedings of the 19th Winter School "Geometry and Physics", GDML_Books,  (2000), pp. 43-52. http://gdmltest.u-ga.fr/item/701646/