Birmingham, Danny and Sachs, I. and Sen, Siddhartha (1997) Three-Dimensional Black Holes and String Theory. (Preprint)
Birmingham, Danny and Sen, Siddhartha (1990) Generalized Skein Relations from Chern-Simons Field Theory. (Preprint)
Sen, Siddhartha and Tuite, Michael P. (1988) A String Motivated Approach to the Relativistic Point Particle. (Preprint)