@article{IVM_1967_5_a12,
     author = {V. R. Fridlender and L. H. Hamitov},
     title = {The generalized {Duff{\textendash}Friedman} problem},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {101--107},
     year = {1967},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1967_5_a12/}
}