@article{SEMR_2006_3_a5,
     author = {E. V. Nikitenko},
     title = {On non-standard {Einstein} extensions of five dimensional nilpotent metric {Lie} algebras},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {115--136},
     publisher = {mathdoc},
     volume = {3},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2006_3_a5/}
}