via this discussion in HN: https://news.ycombinator.com/item?id=22729461 (2020) I found:
Writing an OS in Rust: Async/Await (2020) https://os.phil-opp.com/async-await/
Blogging about Midori: Asynchronous Everything (2015) https://joeduffyblog.com/2015/11/19/asynchronous-everything/