Vasilev Sergei V. RussiaSaratov Saratov State University, Russia, Saratov, Astrakhanskaya 83 Аспирант кафедры математической физики и вычислительной математикиVasilievSV@info.sgu.ru Author's articles An Inverse Spectral Problem for Sturm – Liouville Operators with Singular Potentials on Graphs with a Cycle
