@article{10_5427_jsing_2010_2g,
     author = {Shyuichi Izumiya and Kentaro Saji},
     title = {The mandala of {Legendrian} dualities for pseudo-spheres in {Lorentz-Minkowski} space and ``flat'' spacelike surfaces},
     journal = {Journal of Singularities},
     pages = {92--127},
     publisher = {mathdoc},
     volume = {2},
     year = {2010},
     doi = {10.5427/jsing.2010.2g},
     url = {http://geodesic.mathdoc.fr/articles/10.5427/jsing.2010.2g/}
}