Le groupe des classes de l'algèbre affine d'une forme quadratique Alain Bouvier (1978) Publications du Département de mathématiques (Lyon)
Length spectra of the Hecke triangle groups. Thomas A. Schmidt, Mark Sheingorn (1995) Mathematische Zeitschrift
Lineare Relationen zwischen Darstellungszahlen quadratischer Formen Martin Kneser (1967) Mathematische Annalen
Linearly Independent Zeros of Quadratic Forms over Number-Fields. J.H.H. Chalk (1980) Monatshefte für Mathematik
Local conditions for global representations of quadratic forms Rainer Schulze-Pillot (2009) Acta Arithmetica
Lower bounds for the principal genus of definite binary quadratic forms. Hopkins, Kimberly, Stopple, Jeffrey (2010) Integers