@article{IVM_1964_5_a12,
     author = {A. I. Per\v{s}in},
     title = {The geometric theory of the {Radon} case of the singular {Lagrange} variational problem in $X_4$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {95--99},
     publisher = {mathdoc},
     number = {5},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1964_5_a12/}
}