%0 Journal Article %A I. A. Panin %A D. N. Tyurin %T Pfister forms and a~conjecture due~to~Colliot--Th\'{e}l\`{e}ne in the mixed characteristic case %J Izvestiya. Mathematics %D 2024 %P 977-987 %V 88 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2024_88_5_a4/ %G en %F IM2_2024_88_5_a4