@article{ZNSL_1993_206_a10,
     author = {A. Yu. Solynin},
     title = {Some extremal problems for circular polygons},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {127--136},
     publisher = {mathdoc},
     volume = {206},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1993_206_a10/}
}