%0 Journal Article %A P.E. SCHUPP %T On the Conjugacy Problem for Certain Quotient Groups of Free Products. %J Mathematische Annalen %D 1970 %P 123-129 %V 186 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAN_1970__186_161977/ %F MAN_1970__186_161977