Theoretical methods (New books) 100 newest books. Updated weekly. en-us http://www.eruditor.com Michel Willem: Critical Point Theory And Hamiltonian Systems Springer-Verlag New York Inc, 1989, 291 pages, ISBN: 9780387969084, Our price: 63.99 GBP http://www.eruditor.com/books/item/9780387969084.html.en http://www.eruditor.com/books/item/9780387969084.html.en