%0 Journal Article %A I. Ya. Aref'eva %A A. A. Bagrov %T Formation of trapped surfaces in the~collision of nonexpanding gravitational shock waves in an~$\text{AdS}_4$ space--time %J Teoretičeskaâ i matematičeskaâ fizika %D 2009 %P 382-399 %V 161 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_2009_161_3_a6/ %G ru %F TMF_2009_161_3_a6