@article{VMUMM_1989_2_a20,
     author = {Nguen Tkhan' Nam},
     title = {A problem with an oblique derivative in a domain with edges},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {77--79},
     publisher = {mathdoc},
     number = {2},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1989_2_a20/}
}