@article{ZNSL_2010_383_a5,
     author = {F. I. Ivanov and V. A. Shlyk},
     title = {Null-sets for the extremal lengths},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {86--96},
     publisher = {mathdoc},
     volume = {383},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2010_383_a5/}
}