@article{IM2_2001_65_4_a9,
     author = {N. A. Tyurin},
     title = {The correspondence principle in {Abelian} {Lagrangian} geometry},
     journal = {Izvestiya. Mathematics},
     pages = {823--834},
     year = {2001},
     volume = {65},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2001_65_4_a9/}
}