@article{article5cb46d8a,
title   = {The jacobi map for gravitational lensing: the role of the exponential map},
author = {Reimberg, Paulo Henrique Flose and Abramo, Luis Raul Weber},
year = {2013},
doi = {10.1088/0264-9381/30/6/065020},
journal   = {CLASSICAL AND QUANTUM GRAVITY}
}