1. Phases of N = 2 theories in two dimensions
2. E. Witten, On the Landau-Ginzburg description of N = 2 minimal models, IASSNS-HEP-93-10, hep-th/9304026.
3. Algebraic geometry and effective lagrangians
4. Catastrophes and the classification of conformal theories
5. E. Martinec, Critically, catastrophes and compactifications, in: Physics and mathematics of strings, V.G. Knizhnik memorial volume, eds. L. Brink et al.