@article{SM_1969_7_4_a3,
     author = {N. T. Tynyanskii},
     title = {Conjugate concave-convex functions in linear topological spaces and their saddle points},
     journal = {Sbornik. Mathematics},
     pages = {503--531},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {1969},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1969_7_4_a3/}
}