@article{ZNSL_2000_270_a11,
     author = {V. L. Oleinik},
     title = {Tight-binding approximation on the lemniscate},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {258--276},
     year = {2000},
     volume = {270},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2000_270_a11/}
}