"Fielding Dissertation: Chapter 5: Representational State Transfer (REST)":

http://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.html

RESTful Web Services, by Leonard Richardson and Sam Ruby, available from O’Reilly Media at http://shop.oreilly.com/product/9780596529260.do

JSR 370: JAX-RS 2.1: The Java API for RESTful Web Services:

http://jcp.org/en/jsr/detail?id=370

Jersey project:

https://jersey.github.io/