@article{DE_2006_42_2_a6,
     author = {I. V. Sadovnichaya},
     title = {A new estimate for the spectral function of the self-adjoint extension in $L^2(\mathbb R)$ of the 
},
     journal = {Differencialʹnye uravneni\^a},
     pages = {188--201},
     publisher = {mathdoc},
     volume = {42},
     number = {2},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2006_42_2_a6/}
}