@article{IM2_2014_78_5_a0,
     author = {F. G. Avkhadiev},
     title = {A geometric description of domains whose {Hardy} constant is equal to~1/4},
     journal = {Izvestiya. Mathematics},
     pages = {855--876},
     year = {2014},
     volume = {78},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2014_78_5_a0/}
}