@article{ZNSL_2017_456_a13,
     author = {R. R. Salimov and B. A. Klishchuk},
     title = {A extremal problem for the areas of images of disks},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {160--171},
     publisher = {mathdoc},
     volume = {456},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2017_456_a13/}
}