%0 Journal Article %A Fritz, Franz J. %T On centralizers of involutions having a component of type $A_6$ and $A_7$ %J Rendiconti del Seminario Matematico della Università di Padova %D 1975 %P 1-29 %V 54 %I Seminario Matematico of the University of Padua %U http://www.numdam.org/item/RSMUP_1975__54__1_0/ %G en %F RSMUP_1975__54__1_0