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Routing React Apps: The Complete Guide
https://scotch.io/tutorials/routing-react-apps-the-complete-guide
An in-depth article covering use of React-Router (v2) -
Let the URL Do the Talking
http://formidable.com/blog/2016/07/11/let-the-url-do-the-talking-part-1-the-pain-of-react-router-in-redux/
http://formidable.com/blog/2016/07/19/let-the-url-do-the-talking-part-2-bargaining-and-acceptance-with-redux-and-react-router/
http://formidable.com/blog/2016/07/25/let-the-url-do-the-talking-part-3-empower-the-url-with-redux-little-router/
http://formidable.com/blog/2016/09/13/introducing-nested-routing-in-redux-little-router/
A series of articles discussing pain points when using React-Router and Redux together, and introducing a library called Redux-Little-Router as an alternative -
Do I Even Need a Routing Library?
http://jamesknelson.com/even-need-routing-library/
Another excellent article from James K Nelson that digs into the core concepts behind a topic, this time looking at what routing libraries do, issues with browser history, and what to consider when deciding on a routing approach.