@article{MZM_2001_69_4_a9,
     author = {A. M. Akhtyamov},
     title = {Calculating the {Coefficients} of the {Expansion} in {Derived} {Keldysh} {Chains} for an {Elliptic} {Problem} with {Parameter} in the {Boundary} {Condition}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {622--625},
     publisher = {mathdoc},
     volume = {69},
     number = {4},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2001_69_4_a9/}
}