- https://glebbahmutov.com/blog/node-server-with-rx-and-cycle/
- https://rxjs.dev/api/index/function/merge
- https://netbasal.com/creating-custom-operators-in-rxjs-32f052d69457
- https://github.com/redux-observable/redux-observable/blob/master/src/combineEpics.ts
- https://thecodebarbarian.com/rest-apis-with-observables.html
- https://egghead.io/lessons/rxjs-read-effects-from-the-dom-with-click-events
- https://gist.github.com/staltz/868e7e9bc2a7b8c1f754
- https://gist.github.com/staltz/868e7e9bc2a7b8c1f754#why-should-i-consider-adopting-rp
- https://www.cse.chalmers.se/~rjmh/Papers/whyfp.pdf
- https://stackoverflow.com/a/5878525
- https://vimeo.com/6631514#