@article{ZNSL_2022_512_a4,
     author = {P. B. Zatitskiy and D. M. Stolyarov},
     title = {On locally concave functions on simplest nonconvex domain},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {40--87},
     publisher = {mathdoc},
     volume = {512},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2022_512_a4/}
}