@article{SEMR_2019_16_a51,
     author = {Alexander V. Osipov},
     title = {Remarks on {Ostrovsky's} theorem},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {435--438},
     publisher = {mathdoc},
     volume = {16},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2019_16_a51/}
}