%0 Journal Article %A A. V. Topchiev %A V. N. Andronov %T The alkylation of isopentane by propylene and isobutylene in the presence of various phosphoric acids containing fluorine and boron fluoride %J Doklady Akademii Nauk %D 1957 %P 1076-1079 %V 113 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1957_113_5_a32/ %G ru %F DAN_1957_113_5_a32