no. 2
Bianchi universes admitting full groups of motions
Annales de l'institut Henri Poincaré. Section A, Physique Théorique, Tome 19 (1973) no. 2, pp. 197-210. 
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     title = {Bianchi universes admitting full groups of motions},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
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     publisher = {Gauthier-Villars},
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     number = {2},
     year = {1973},
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     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1973__19_2_197_0/}
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Osinovsky, M. E. Bianchi universes admitting full groups of motions. Annales de l'institut Henri Poincaré. Section A, Physique Théorique, Tome 19 (1973) no. 2, pp. 197-210. http://www.numdam.org/item/AIHPA_1973__19_2_197_0/

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[3] A. Lichnerowicz, Géométrie des groupes de transformations, Paris, 1958. | MR | Zbl

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[6] J. Wolf, Spaces of constant curvature, New York, 1967. | MR | Zbl

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