@article{SMZ_2007__48_4_55655,
     author = {Salakhitdinov, M.S. and Urinov, A.K.},
     title = {Eigenvalue problems for a mixed-type equation with two singular coefficients.},
     journal = {Sibirskij Matematicheskij Zhurnal},
     pages = {882},
     publisher = {mathdoc},
     volume = {48},
     number = {4},
     year = {2007},
     zbl = {1164.35450},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/SMZ_2007__48_4_55655/}
}