@article{FAA_2000_34_2_a7,
     author = {S. Yu. Dobrokhotov and A. I. Shafarevich},
     title = {Tunnel {Splitting} of the {Spectrum} of the {Beltrami--Laplace} {Operators} on {Two-Dimensional} {Surfaces} with {Square} {Integrable} {Geodesic} {Flow}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {67--69},
     publisher = {mathdoc},
     volume = {34},
     number = {2},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2000_34_2_a7/}
}