Kupeli, Demir N. books & textbook
Osserman Manifolds in Semi-Riemannian Geometry (Lecture Notes in Mathematics, 1777)
Garcia-Rio, Eduardo Kupeli, Demir N. Vazquez-Lorenzo, Ramon
Springer /2002-02-25 Paperback / 178 Pages
isbn-10: 3540431446 / isbn-13: 9783540431442
