Journal of Geometry and Physics
Journal of Geometry and Physics > 2002 > 42 > 3 > 216-258
Journal of Geometry and Physics > 2002 > 42 > 3 > 259-282
Journal of Geometry and Physics > 2002 > 42 > 3 > 195-215
Journal of Geometry and Physics > 2002 > 42 > 3 > 216-258
Journal of Geometry and Physics > 2002 > 42 > 3 > 259-282
Journal of Geometry and Physics > 2002 > 42 > 3 > 195-215