%0 Journal Article %A A. A. Makhnev %T On strongly regular extensions of generalized quadrangles %J Sbornik. Mathematics %D 1995 %P 497-505 %V 80 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1995_80_2_a11/ %G en %F SM_1995_80_2_a11