@article{MT_2013_16_1_a0,
     author = {N. A. Abiev},
     title = {On the {Ricci} curvature of solvable metric lie algebras with two-step nilpotent derived algebras},
     journal = {Matemati\v{c}eskie trudy},
     pages = {3--17},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2013_16_1_a0/}
}