@article{ZVMMF_1972_12_1_a28,
     author = {Yu. B. Grebenshchikov and A. V. Shipilin},
     title = {Maximum propulsion nozzles with a given side surface area},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {262--265},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1972_12_1_a28/}
}