%0 Journal Article %A W. Zelichowicz %T On the equation \((x^2 - 1)(z^2 - 1) = (у^2 - 1)^2\) %J Commentationes Mathematicae %D 1969 %P 113-118 %V 13 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/cm.v13i1.5664/ %R 10.14708/cm.v13i1.5664 %G pl %F 10_14708_cm_v13i1_5664