00579nam a2200169 a 450000500170000008200170001710000180003424501280005226000390018049000280021969000220024770000160026996400190028599700180030499900170032295200700033920251203090657.0  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  aGeometric methods  aPalev, T.D.  bENGcdefg_  a12520 LIBSC C  c15998d15998  00104070aPUbPUd1998-07-16g434.00l0o512, D, Doep12520yBK