1. Abschätzungen bei linearen elliptischen Systemen 1. Ordnung mit zwei unabhängigen Variablen
2. Existence and uniqueness of a subsonic flow past a given profile
3. und , Partial Differential Equations. New York, London, Sydney 1954.
4. und , On a representation theorem for linear elliptic systems with discontinuous coefficients and its applications. Convegno Internazionale sulle Equazioni lineari alle Derivate Parziali. Trieste 1954. Rom 1955.