1. [A] D. Abramovich, in preparation.
2. A compactification of the universal Picard variety over the moduli space of stable curves;Caporaso, Lucia;J. Amer. Math. Soc.,1994
3. Hilbert stability of rank-two bundles on curves;Gieseker, David;J. Differential Geom.,1984
4. Tata Institute of Fundamental Research Lectures on Mathematics and Physics;Gieseker, D.,1982