@article{ZNSL_1980_100_a10,
     author = {S. I. Fedorov},
     title = {On the maximum of the conform radien's product of four non-overlapping domains},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {146--165},
     publisher = {mathdoc},
     volume = {100},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1980_100_a10/}
}