@article{MT_2017_20_1_a8,
     author = {A. A. Mogul'skiǐ},
     title = {On a property of the {Legendre} transform},
     journal = {Matemati\v{c}eskie trudy},
     pages = {145--157},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2017_20_1_a8/}
}