A functional analytic approach to the numerical solution of nonlinear elliptic equations. - Eugene L. Allgower; Ronald Guenther (Computing, 1967)

On the numerical solution of higher order nonlinear parabolic equations. - Eugene L. Allgower; Ronald Guenther (Computing, 1968)

A transform method for solving certain systems of linear algebraic equations. - Ronald Guenther (Computing, 1971)