Arnes Blanert wrote an extensive article for the architect magazine on the subject of Single Sign On (SSO). It covers both authentication and authorization via a variety of widely and not so widely used methods, including oAuth, SAML, JSON Web Token and more.
As someone who was involved in a variety of Single Sign On implementations (see some of the posts on the subject in my blog), I wish I had an article like this in my RSS feeds much much earlier.