+ wishlist Add to Cart The item has been added Author: Gyula Csató Bernard Dacorogna Olivier Kneuss The Pullback Equation for Differential Forms (Progress in Nonlinear Differential Equations and Their Applications #83) [9780817683122] Buy More - Save More. Below are the available bulk discount rates for each individual item when you purchase a certain amount Quantity Price Savings 25 - 49 12% 50 - 99 13% 100+ 14% List Price As Low as $139.99 Format: Hardcover