World-models and the world-picture

World-sheet aspects of mirror symmetry

World-Sheet Corrections Via D-Instantons

World-Sheet Defects, Strings, and Quark Confinement

World-sheet duality for D-branes with travelling waves

World-Sheet Duality, Space-Time Foam, and the Quantum Fate of a Stringy Black Hole

World-sheet dynamics of ZZ branes

World-Sheet formulation of M theory

World-Sheet Geometry and Baby Universes in 2-D Quantum Gravity

World-sheet Instanton Superpotentials in Heterotic String theory and their Moduli Dependence

World-sheet instantons and the Peccei-Quinn symmetry

World-sheet Instantons via the Myers Effect and N=1^* Quiver Superpotentials

World-Sheet Logarithmic Operators and Target Space Symmetries in String Theory

World-sheet scattering in AdS_5 x S^5 at two loops

World-sheet Stability of (0,2) Linear Sigma Models

World-Sheet String Duality and the Hidden Supersymmetry

World-Sheet Supersymmetry Without Contact Terms

World-Sheets from N=4 Super Yang-Mills

World-Volume Action of the M Theory Five-Brane

World-Volume Description of M2-branes Ending on an M5-brane and Holography