@article{DAN_1980_251_3_a7,
     author = {N. La\v{z}eti\'c},
     title = {On the convergence of spectral decompositions corresponding to nonnegative selfadjoint extensions of the {Sturm--Liouville} operator},
     journal = {Doklady Akademii Nauk},
     pages = {548--550},
     publisher = {mathdoc},
     volume = {251},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_251_3_a7/}
}