TY - JOUR AU - A. A. Akopyan AU - A. V. Levichev TI - On $\mathrm{SO}(3,3)$ as the projective group of the space $\mathrm{SO}(3)$ JO - Zapiski Nauchnykh Seminarov POMI PY - 2018 SP - 5 EP - 19 VL - 476 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZNSL_2018_476_a0/ LA - en ID - ZNSL_2018_476_a0 ER -