CometD :: Java :: Client :: WebSocket :: OkHttp
 | WebSocket Essentials – Building Apps with HTML5 WebSockets (2015) by Chopra, Varun |
 | Java WebSocket Programming (Oracle Press) (2013) by Coward, Danny |
 | Developing RESTful Services with JAX-RS 2.0, WebSockets, and JSON (2013) by Mehta, Bhakti, Kalali, Masoud |
