@article{MZM_2000_67_5_a6,
     author = {V. V. Dubrovskii and S. A. Terent'ev},
     title = {Regularized traces of a~perturbed {Laplace--Beltrami} operator on the unit two-dimensional sphere},
     journal = {Matemati\v{c}eskie zametki},
     pages = {702--705},
     publisher = {mathdoc},
     volume = {67},
     number = {5},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2000_67_5_a6/}
}