%0 Journal Article %A Joseph Roitberg %T Rational Lie Algebras and p-Isomorphisms of Nilpotent Groups and Homotopy Types. %J Commentarii mathematici Helvetici %D 1975 %P 1-8 %V 50 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1975__50_139601/ %F CMH_1975__50_139601