@article{AIHPC_2020__37_2_343_0,
     author = {Kell, Martin and Suhr, Stefan},
     title = {On the existence of dual solutions for {Lorentzian} cost functions},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {343--372},
     publisher = {Elsevier},
     volume = {37},
     number = {2},
     year = {2020},
     doi = {10.1016/j.anihpc.2019.09.005},
     mrnumber = {4072806},
     zbl = {1439.49060},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2019.09.005/}
}