@article{MZM_1974_15_1_a12,
     author = {V. A. Kondratiev and S. D. \`Eidel'man},
     title = {Biharmonic functions, nonnegative in a~half-strip},
     journal = {Matemati\v{c}eskie zametki},
     pages = {121--128},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_15_1_a12/}
}