Hahn, W. (1963). Theory and application of Liapunov's direct method. Prentice-Hall.
Cita Chicago (17th ed.)Hahn, Wolfgang. Theory and Application of Liapunov's Direct Method. Englewood Cliffs: Prentice-Hall, 1963.
Cita MLA (9th ed.)Hahn, Wolfgang. Theory and Application of Liapunov's Direct Method. Prentice-Hall, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.