@article{ZNSL_1999_261_a8,
     author = {S. E. Kozlov and M. Yu. Nikanorova},
     title = {The geometry of the {Lie} algebra of the orthogonal group $O(\mathbb R^4)$},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {119--124},
     year = {1999},
     volume = {261},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1999_261_a8/}
}