@article{MZM_2017_102_1_a4,
     author = {V. V. Karachik and B. T. Torebek},
     title = {On the {Dirichlet--Riquier} {Problem} for {Biharmonic} {Equations}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {39--51},
     publisher = {mathdoc},
     volume = {102},
     number = {1},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2017_102_1_a4/}
}