Cordes, H. O. (1979). Elliptic pseudo-differential operators: An abstract theory. Springer-Verlag.
Cita Chicago (17th ed.)Cordes, H. O. Elliptic Pseudo-differential Operators: An Abstract Theory. Berlín: Springer-Verlag, 1979.
Cita MLA (9th ed.)Cordes, H. O. Elliptic Pseudo-differential Operators: An Abstract Theory. Springer-Verlag, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.