@article{ISU_2019_19_4_a0,
     author = {S. V. Vasilev},
     title = {An inverse spectral problem {for~Sturm--Liouville} operators with~singular potentials on graphs with a cycle},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {366--376},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ISU_2019_19_4_a0/}
}