Your query returned 2 results.

• Quasi-Newton Preconditioners for the Solution of Large Nonlinear Systems in Porous Media,
  L. Bergamaschi, R. Bru, A. Martínez and M. Putti
  Paper 75 from CCP: 89, ISBN 978-1-905088-26-3 (2008)
  
• Gradient Eigenanalysis on Nested Finite Elements,
  L. Bergamaschi, G. Gambolati, G. Pini and M. Putti
  Paper 8.1 from CCP: 26, ISBN 0-948749-28-8 (1994)