L. Nirenberg
Abstract and applied analysis
Lectures on linear partial differential equations
Remarks on strongly elliptic partial differential equations
Topics in nonlinear functional analysis
Existence theorems in partial differential equations
Functional analysis
Functional analysis, 1960-1961
On the analyticity of the solutions of linear elliptic systems of partial differential equations
Seminar on differential geometry in the large, 1948
Topics in nonlinear functional analysis, 1973-1974