@article{MZM_1994_56_1_a15,
     author = {B. N. Biyarov and S. A. Dzhumabaev},
     title = {A~criterion for the {Volterra} property of boundary value problems for {Sturm--Liouville} equations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {143--146},
     publisher = {mathdoc},
     volume = {56},
     number = {1},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1994_56_1_a15/}
}