@article{ZNSL_2019_481_a9,
     author = {G. Khimshiashvili and G. Panina and D. Siersma},
     title = {Extremal areas of polygons with fixed perimeter},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {136--145},
     year = {2019},
     volume = {481},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2019_481_a9/}
}