@article{article0b50f4e7,
title   = {Maslov index in semi-Riemannian submersions},
author = {Caponio, Erasmo and Javaloyes, Miguel Angel and Piccione, Paolo},
year = {2010},
doi = {10.1007/s10455-010-9200-x},
journal   = {Annals of Global Analysis and Geometry}
}