@article{MZM_2012_91_5_a13,
     author = {N. V. Artamonov},
     title = {Estimate of the {Decay} {Exponent} of an {Operator} {Semigroup} {Associated} with a {Second-Order} {Linear} {Differential} {Equation}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {780--783},
     publisher = {mathdoc},
     volume = {91},
     number = {5},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2012_91_5_a13/}
}