@article{ISU_2017_17_1_a4,
     author = {V. A. Yurko},
     title = {On recovering differential pencils on a bush-type graph},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {51--61},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2017_17_1_a4/}
}