@article{ISU_2019_19_4_a2,
     author = {V. A. Yurko},
     title = {On recovering differential operators on a closed set from spectra},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {389--396},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ISU_2019_19_4_a2/}
}