@article{10_4153_CJM_1999_049_9,
     author = {Arnold, V. I.},
     title = {First {Steps} of {Local} {Contact} {Algebra}},
     journal = {Canadian journal of mathematics},
     pages = {1123--1134},
     year = {1999},
     volume = {51},
     number = {6},
     doi = {10.4153/CJM-1999-049-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1999-049-9/}
}