1. Twisted bundles and admissible covers;Abramovich;Commun. Algebra,2003
2. The Picard groups of the moduli spaces of curves;Arbarello
3. Covers of an elliptic curve $E$ and curves in $E\times \mathbb{P}^1$;Bujokas
4. Covers of elliptic curves and the moduli space of stable curves;Chen;J. Reine Angew. Math.,2010
5. admcycles–a Sage package for calculations in the tautological ring of the moduli space of stable curves;Delecroix