@article{article2fa985b6,
title   = {Morse theory for the travel time brachistochrones in stationary spacetimes},
author = {Giannoni, Fábio and Piccione, Paolo and Tausk, Daniel Victor},
year = {2002},
doi = {10.3934/dcds.2002.8.697},
journal   = {Discrete and Continuous Dynamical Systems. Series A}
}