Duality without supersymmetry
Advances in Theoretical and Mathematical Physics International Press of Boston 2:5 (1998) 987-1009
Excited-state energies and supersymmetric indices
Advances in Theoretical and Mathematical Physics International Press of Boston 1:2 (1997) 210-236
Tunneling between Edge States in the Fractional Quantum Hall Effect
Chapter in Low-Dimensional Applications of Quantum Field Theory, Springer Nature 361 (1997) 245-264