@article{SEMR_2007_4_a20,
     author = {E. S. Kornev},
     title = {Left-invariant almost complex structures and the associated metrics on four-dimensional direct products of {Lie} groups},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {304--344},
     publisher = {mathdoc},
     volume = {4},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2007_4_a20/}
}