PageHeader : Funkcialaj Ekvacioj, 30 (1987) 417-425 Title : Viscosity Solutions for a System of Elliptic Title : Inequalities with Bilateral Obstacles AuthorInfo : By AuthorInfo : Naoki YAMADA AuthorInfo : (Kobe University, Japan) section : §1. Introduction section : §2. Assumptions and main theorem section : §3. Approximate systems and a priori estimates section : §4. Proof of the main theorem section : References