@article{10_4007_annals_2019_189_3_8,
     author = {Jun-Muk Hwang},
     title = {An application of {Cartan{\textquoteright}s} equivalence method to {Hirschowitz{\textquoteright}s} conjecture on the formal principle},
     journal = {Annals of mathematics},
     pages = {979--1000},
     publisher = {mathdoc},
     volume = {189},
     number = {3},
     year = {2019},
     doi = {10.4007/annals.2019.189.3.8},
     zbl = {07097494},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2019.189.3.8/}
}