1. See e.g. the contributions to and references in: Supermembranes and Physics in 2+1 Dimensions, 1989 Trieste Conference, Duff, M., Pope, C. N., Sezgin, E. (eds.), Singapore: World Scientific (1990)
2. Goldstone, J.: unpublished
3. Hoppe, J.: Quantum theory of a relativistic surface..., MIT PhD Thesis 1982, Elem. Part. Res. J. (Kyoto)83, 3 (1989/90)
4. Fairlie, D., Fletcher, P., Zachos, C. N.: Trigonometric structure constants for new infinite algebras. Phys. Lett.B218, (1989), 203
5. Hoppe, J.: Diff A T 2 and the curvature of some infinite dimensional manifolds. Phys. Lett.B215, 706 (1988)