Hi Gabriel, the web archive (wayback machine) has some entries still:
https://web.archive.org/web/20180608141921/http://lilypondblog.org/2017/04/ooolilypond-creating-musical-snippets-in-libreoffice-documents https://web.archive.org/web/20180608141921/http://lilypondblog.org/2018/02/ooolilypond-part-2-optimizing/ I also used it for school exercises quite a lot. Best, Michael
