@article{IVM_2005_5_a4,
     author = {S. G. Leiko},
     title = {Isoperimetric problems for rotational functionals of the first and second orders in {(pseudo)Riemannian} manifolds},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {49--55},
     publisher = {mathdoc},
     number = {5},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2005_5_a4/}
}