1. Electric/magnetic deformations ofS3and AdS3, and geometric cosets
2. Heterotic strings on homogeneous spaces
3. Ads(2) x s**2 as an exact heterotic string background, hep-th/0502213. Talk given at NATO Advanced Study Institute and EC Summer School on String Theory: From Gauge Interactions to Cosmology, Cargese, France, 7–19 Jun 2004.
4. Coset models and d-branes in group manifolds, hep-th/0511210.