@article{VMUMM_2004_6_a4,
     author = {D. Z. Kagan},
     title = {Existence of nontrivial pseudocharacters on anomalous products of groups},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {24--28},
     publisher = {mathdoc},
     number = {6},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2004_6_a4/}
}