LU, Y. C. (1976). Singularity theory and an introduction to catastrophe theory. Springer-Verlag.
Cita Chicago (17th ed.)LU, Yung Chen. Singularity Theory and an Introduction to Catastrophe Theory. New york: Springer-Verlag, 1976.
Cita MLA (9th ed.)LU, Yung Chen. Singularity Theory and an Introduction to Catastrophe Theory. Springer-Verlag, 1976.
Atenció: Aquestes cites poden no estar 100% correctes.