1. appropriate" presentational method for rendering a musical idea comprehensible. Schoenberg's concept of unfolding, when combined with our knowledge of standard twelve-tone operations and his own general theory of presentation;On the compositional history of Op. 25, see Jan Maegaard,1962
2. Cross-Partitions as Harmony and Voice-Leading in Twelve-Tone Music;Brian Alegant;Music Theory Spectrum,2001
3. Schoenberg's Op. 22 Radio Talk and Developing Variation in Atonal Music;Jack Boss;Music Theory Spectrum,1992