Search results
Journal of Geometry and Physics > 1996 > 20 > 2-3 > 207-217
Journal of Geometry and Physics > 1995 > 17 > 4 > 381-390
Journal of Geometry and Physics > 1996 > 20 > 2-3 > 207-217
Journal of Geometry and Physics > 1995 > 17 > 4 > 381-390