References for the Mass Formula (for quadratic lattices):

Arbitrary Lattices

Maximal Lattices

Unimodular Lattices

Murata -- Shimura's mass formula for an orthogonal group over real quadratic fields (2006)
Belolipetsky, Gan -- The mass of unimodular lattices (2005)
Conway, Sloane -- The unimodular lattices of dimension up to $23$ and the Minkowski-Siegel mass constants (1982)

Survey Articles

Shimura -- Quadratic Diophantine equations, the class number, and the mass formula (2006)

MassFormula (last edited 2009-03-01 00:55:51 by localhost)