A Spinorial Approach to Riemannian and Conformal Geometry (Ems Monographs in Mathematics) by Jean-Pierre Bourguignon and Oussama Hijazi English | 2015 | ISBN: 3037191368 | 462 pages | PDF | 3 MB
Geometric Properties of Natural Operators Defined by the Riemann Curvature Tensor by Peter B Gilkey English | 2001 | ISBN: 9810247524 | 316 pages | PDF | 3,4 MB