@article{LJM_2006_23_a5,
     author = {A. G. Kushner},
     title = {Almost product structures and {Monge-Amp\`ere} equations},
     journal = {Lobachevskii journal of mathematics},
     pages = {151--181},
     publisher = {mathdoc},
     volume = {23},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/LJM_2006_23_a5/}
}