@article{ZNSL_1991_198_a2,
     author = {V. V. Ishkhanov and B. B. Lur'e},
     title = {On embedding problem with nonabelian kernel of the order~$p^4${.~III}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {20--27},
     publisher = {mathdoc},
     volume = {198},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1991_198_a2/}
}