https://henry.codes/writing/how-to-convert-variable-ttf-font-files-to-woff2/#installing-the-library

https://web.dev/learn/css/typography

http://torinak.com/font/lsfont.html

https://wakamaifondue.com/

https://learn.microsoft.com/de-de/typography/opentype/spec/featurelist

https://buchlayout.info/die-sensation-ist-perfekt-der-libreoffice-writer-unterstuetzt-ab-sofort-opentype-features/