@article{IVM_1974_4_a4,
     author = {S. A. Kas'yanyuk and G. I. Tkachuk},
     title = {A~certain class of extremal problems for a~circular disc that is subjected to the action of concentrated forces},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {32--38},
     publisher = {mathdoc},
     number = {4},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1974_4_a4/}
}