Elliptic partial differential equations in two variables with analytic coefficients -- Boundary value problems associated with e[u]=0 -- Higher order, linear elliptic equations of two independent variables -- Further representations for solutions of higher order elliptic differential equations with analytic coefficients -- Elliptic equations in dimension n?3 -- Singularity properties of solutions to partial differential equations -- Higher order and higher dimensional elliptic problems -- Initial value problems for semilinear elliptic equations -- Elliptic systems of first order differential equations: General theory -- Elliptic systems of first order differential equations: Further results and constructive methods.