1. [ℵ-C-V]A-C-V D. Abramovich, A. Corti and A. Vistoli, Twisted bundles and admissible covers, preprint, 2001, arXiv:math.AG/0106211.
2. [ℵ-G-V]A-G-V D. Abramovich, T. Graber and A. Vistoli, Algebraic orbifold quantum products, in preparation.
3. [ℵ-J]A-Jarvis D. Abramovich and T. Jarvis, Moduli of twisted spin curves, preprint, arXiv:math.AG/0104154.
4. Alterations and resolution of singularities;Abramovich, Dan,2000
5. [ℵ-V1]A-V:stable-maps D. Abramovich and A. Vistoli, Complete moduli for families over semistable curves, preprint, arXiv:math.AG/9811059.