@article{AL_1990_29_5_a3,
     author = {E. Ya. Markushina},
     title = {Schur multipliers of groups of automorphisms of free groups},
     journal = {Algebra i logika},
     pages = {561--570},
     year = {1990},
     volume = {29},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1990_29_5_a3/}
}