Originally posted in 2006 on a Swedish website. Written by Andie Nordgren (@nordgren), one of the first people to use the term relationship anarchy. This is a great starting point for someone just starting to look into RA. It has nine short paragraphs that cover the basics, from valuing each relationship independently to designing commitments that work in your life.
The Thinking Asexual has a lot of good blog posts, and much of what is written about how asexuals experience relationships is relevant to RA, particularly in regards to not elevating one type of relationship above another. This blog post offers an overview, lots of definitions and examples, and an explanation of how RA applies to asexuals, aromantics, mixed orientation sexual people, and celibates.
An article on Psychology Today (@PsychToday), written by Dr. Elisabeth Sheff (@drelisheff1), who is a global expert on polyamory and also the author of The Polyamorists Next Door. In this article, she explore the spectrum of non-monogamy, from cheating (unethical, non-consensual non-monogamy) through polygamy, swinging and RA.