@article{RM_1979_34_1_a4,
     author = {S. S. Kutateladze},
     title = {Convex operators},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {181--214},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1979},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1979_34_1_a4/}
}