Proceedings and Book chapters

1. Non linear sigma models: a geometrical approach in quantum field theory.
   E.A., Lecture Notes in Physics 226 (1985) 140-158.
2. Bosonization methods in string theories.
   E.A., in "Encuentro Latino americano de Fisica de Altas Energias" Univ. Santa Maria, Proceedings, 1988.
3. Thirring Strings: use of generalized non abelian bosonization techniques.
   E.A., in ``II Summer Meeting on Quantum Mechanics of Fundamental Physics " ed. C. Teitelboim, J. Zanelli, Plenum Press, p.281-299.
4. Gauge independent analysis of 2D-gravity.
   E.A., M.C.B. Abdalla, J. Gamboa and A. Zadra, Proceedings, Strings and Symmetries, Stony Brook, 1991.
5. Topics in 2D-gravity.
   E.A., M.C.B. Abdalla, J. Gamboa and A. Zadra, Proceedings, XX$^{th}$ Differential Geometric methods in Physics, New York, 1991.
6. Non-critical superstrings: comparison between continuum and discrete approaches.
   E.A. and A. Zadra, Proceedings of the Trieste Summer School, 1993.
7. Towards a solution of two-dimensional QCD.
   E.A. hepth 9510139, ICTP Workshop on Strings Gravity and Related Topics, Trieste 29-30 June, 1995.
8. Two Dimensional Quantum Field Theory: examples and applications
   E.A., hepth/9704192, Apr 1997. 63pp. Talk given at the 1st Caribbean Workshop on Quantum Mechanics, Particles and Fields (CIMAF 97), Havana, Cuba, 24-28 Mar 1997.
9. O Universo e a Mecânica Quântica
   E.A. Mecânica Quântica, ed. S. Salinas and M. Hussein.