%0 Journal Article %A A. A. Avilov %T Birational rigidity of $G$-del~Pezzo threefolds of degree~$2$ %J Sbornik. Mathematics %D 2023 %P 757-792 %V 214 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_2023_214_6_a0/ %G en %F SM_2023_214_6_a0