John C. Crawford and Dorothy L. Crawford - Expressionism in Twentieth-Century Music ( Indiana - University Press ) 1993

 https://ployvaultcat.blogspot.com/2026/03/john-c-crawford-and-dorothy-l-crawford.html

https://drive.google.com/file/d/1Gi3ElwbOLqZs4CzoI9JifTz7t7O1jnKL/view?usp=sharing

Donald J. Grout & Claude V. Palisca - Origens do estilo clássico ( in História da Música Ocidental, Gradiva ) 2007

https://ployvaultcat.blogspot.com/2025/12/donald-j-grout-claude-v-palisca-origens.html

https://drive.google.com/file/d/1Unzr4iEh3v8fERqLhSFhwj8WRSZGiLqV/view?usp=sharing

Georg W.F. Hegel - Cursos de Estética, repostagem ( Edusp ) 2001

https://ployvaultcat.blogspot.com/2023/03/georg-wilhelm-friedrich-hegel-cursos-de.html

https://mega.nz/folder/QQYCCJiT#hTu531M1Ip_RuAVXQPPitw

George Dyer - Front Room (georgedyermedia ) 2025

 https://www.royalulsteracademy.org/

https://www.georgedyer.uk/

https://artlogic-res.cloudinary.com/george-dyer-frontroom-v1.jpg

Elke Stangl - Clovery Coppery Citadel ( elkement, Digitale Kunst, eigene Berechnungen, Computercode ) 2024

 https://www.meisterdrucke.pt/

https://www.meisterdrucke.pt/kunstwerke/1000px/1746816316-271757.jpg

Mark Evan Bonds - Absolute Music: The History Of An Idea ( Oxford University Press ) 2017

 https://drive.google.com

https://drive.google.com/file/d/1J2ovMwOElNCyHQIzIEQ0YGOKVT-V3f6m/view?usp=sharing

Marcel Cobussen & Nanette Nielsen - Music and Ethics (Ashgate Publishing Company) 2012

 https://drive.google.com

https://drive.google.com/file/d/1uvH18W3sOWKNk5UaZSLg8-2BZhp8OLWA/view?usp=sharing