@article{articled67c99d3,
title   = {On the equality between the Maslov index and the spectral index for the semi-Riemannian Jacobi operator},
author = {Eidam, José Carlos Corrêa and Pereira, Antônio Luiz and Piccione, Paolo and Tausk, Daniel Victor},
year = {2002},
doi = {10.1006/jmaa.2001.7817},
journal   = {Journal of Mathematical Analysis and its Applications}
}