Il principio di minimo e sue applicazioni alle equazioni funzionali

1. On Elliptic Partial Differential Equations
L. Nirenberg

2. The L

P
Approach to the Dirichlet Problem
Shmuel Agmon

3. Multiple Integral Peoblems in the Calculus of Variations and Related Topics
Charles B. Morrey

4. Uniformizzazione E Moduli
di L. Bers

Keywords: Mathematics, Difference and Functional Equations