@article{IVM_2010_5_a2,
     author = {Yu. V. Ershov and E. I. Yakovlev},
     title = {Realizability of the $H_k$-distance functions by homology classes of path spaces},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {18--24},
     publisher = {mathdoc},
     number = {5},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2010_5_a2/}
}