Resources—External

1. Hohpe, Gregor, and Bobby Woolf. Enterprise Integration Patterns. Boston: Addison-Wesley Professional, 2003.
2. Microsoft Corporation. Integration Patterns (Patterns & Practices). Redmond: Microsoft Press, 2004.
3. “Synchronous vs. Asynchronous Communication in Applications Integration,” MuleSoft, last accessed March 18, 2019, https://www.mulesoft.com/resources/esb/applications-integration.
4. “Hub and Spoke [or] Zen and the Art of Message Broker Maintenance,” Enterprise Integration Patterns, last accessed March 18, 2019, http://www.eaipatterns.com/ramblings/03_hubandspoke.html.