Brocker, T., & Lander, L. (1975). Differentiable germs and catastrophes. Cambridge University Press.

Brocker, T., and L. Lander. Differentiable Germs and Catastrophes. Londres: Cambridge University Press, 1975.

Brocker, T., and L. Lander. Differentiable Germs and Catastrophes. Cambridge University Press, 1975.