This text is missing some spaces, please add them: ...hispapersonthree-dimensionalalgebraiccurves(1907)andonpseudosphericalthree-dimensionalspace(1885),wheretheimpossibilityofputtingsuchaspaceintoEuclideanfour-dimensionalspaceandthepossibilityofitsbeingplacedinaEuclideanfive-dimensionalspaceareproved.
... his papers on three-dimensional algebraic curves (1907) and on pseudospherical three-dimensional space (1885), where the impossibility of putting such a space into Euclidean four-dimensional space and the possibility of its being placed in a Euclidean five-dimensional space are proved.