00373nam a2200109 a 450000500170000008200170001710000180003424501280005226000390018049000280021970000160024720251203090657.0  a512,bD, Doe  aDoebner, H.D.  aProceedings of the xiii international conference on differential geometric methods in theoretical physics, H.D.Doebner, eng  aSingapore, World Scientific.c1986  aSeries in pure mathsd3  aPalev, T.D.