%0 Journal Article %A Sandi Klavzar %T Strong products of ?-critial graphs. %J Aequationes mathematicae %D 1993 %P 153-162 %V 45 %N 2-3 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1993__45_2-3_137517/ %F AM2_1993__45_2-3_137517