@article{TIMM_2003_9_1_a6,
     author = {R. R. Gadyl'shin},
     title = {On domains with a~narrow isthmus in the critical case},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {50--55},
     year = {2003},
     volume = {9},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2003_9_1_a6/}
}