@article{MZM_2005_77_3_a9,
     author = {V. A. Sadovnichii and Z. Yu. Fazullin},
     title = {Asymptotics of the eigenvalues and the formula for the trace of perturbations of the {Laplace} operator on the sphere~$\mathbb S^2$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {434--448},
     publisher = {mathdoc},
     volume = {77},
     number = {3},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2005_77_3_a9/}
}