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\newblock Springer-Verlag, New York, 2005.
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Angela Gibney, Sean Keel, and Ian Morrison.
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\newblock arXiv.org:math/0703093.

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Joe Harris and David Mumford.
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\newblock Instability in invariant theory.
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Finn~Faye Knudsen and David Mumford.
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David Mumford, John Fogarty, and Frances Kirwan.
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\newblock Springer-Verlag, Berlin, third edition, 1994.

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David Mumford.
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\newblock A new compactification of the moduli space of curves.
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\newblock Geometric reductivity over arbitrary base.
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\newblock Geometric invariant theory and flips.
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