@article{FAA_2001_35_1_a6,
     author = {V. I. Arnol'd},
     title = {Lagrangian {Grassmannian} of a {Quaternion} {Hypersymplectic} {Space}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {74--77},
     publisher = {mathdoc},
     volume = {35},
     number = {1},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2001_35_1_a6/}
}