The 5 API Monetization Models and How to Measure Their Success
Taming the RESTed NARWHL: Striking the Balance Between Usability and Zealotry in REST.
Using Descriptor Languages for Content Negotiation in RESTful APIs
Building Adaptable APIs with NARWHL (API Days Paris)
Developer Experience: Appealing to the 3 Virtues of Great Programmers
The Five API Monetization Models - Rob Zazueta, RESTFest 2016