海量图书期刊资源，随时随地畅享阅读乐趣
Warped products with special Riemannian curvatureMarco Bertola; Daniele Gouthier · Bulletin of the Brazilian Mathematical Society · 2001
Levi-flat and solvable CR-structures on real Lie-algebrasDaniele Gouthier · Annali di Matematica Pura ed Applicata · 1998