@article{DE_2000_36_12_a2,
     author = {Yu. A. Klokov},
     title = {Upper and {Lower} {Functions} in {Boundary} {Value} {Problems} for a {Third-Order} {Ordinary} {Differential} {Equation}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1607--1614},
     publisher = {mathdoc},
     volume = {36},
     number = {12},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2000_36_12_a2/}
}