@article{MAT_1957_1_3_a2,
     author = {G. O. Thorin},
     title = {Convexity theorems},
     journal = {Matematika},
     pages = {43--78},
     publisher = {mathdoc},
     volume = {1},
     number = {3},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1957_1_3_a2/}
}