1. R. Thom, Structural Stability and Morphogenesis, Benjamin 1975
2. V.I. Arnold, Critical Points of Smooth Functions, in Proceedings of the International Congress of Mathematicians, Vancouver 1974
3. E.C. Zeeman, Catastrophe Theory, Addison-Wesley 1977
4. P. Glansdorff and I. Prigogine, Thermodynamic Theory of Structure, Stability and Fluctuations, Wiley-Interscience 1971
5. H. Haken, Synergetics, Springer 1978 and the following lecture in this volume