Interior estimates for second-order elliptic differential (or finite-difference) equations via the maximum principle A. Brandt OriginalPaper Pages: 95 - 121
Theorems of the alternative for complex linear inequalities A. Ben-Israel OriginalPaper Pages: 129 - 136
Zur axiomatischen charakterisierung des steinerpunktes konvexer körper H. Hadwiger OriginalPaper Pages: 168 - 176