@article{SIGMA_2010_6_a63,
     author = {Nicolas Franco},
     title = {Global {Eikonal} {Condition} for {Lorentzian} {Distance} {Function} in {Noncommutative} {Geometry}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2010},
     volume = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2010_6_a63/}
}