> For the complete documentation index, see [llms.txt](https://activiti.gitbook.io/activiti-7-developers-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://activiti.gitbook.io/activiti-7-developers-guide/overview/references.md).

# References

The following list of books & PDFs are recommended reads if you want to understand the project future direction. We use these books as baseline shared language to discuss our architectural decisions and plans.

* [OMG BPMN 2.x Spec](https://www.omg.org/spec/BPMN/)
* [Cloud Native Java](https://www.amazon.co.uk/Cloud-Native-Java-Designing-Resilient/dp/1449374646/ref=sr_1_1?ie=UTF8\&qid=1531487284\&sr=8-1\&keywords=cloud+native+java)
* [Building Microservices](https://www.amazon.co.uk/Building-Microservices-Designing-Fine-Grained-Systems/dp/1492034029/ref=sr_1_3?s=books\&ie=UTF8\&qid=1531487341\&sr=1-3\&keywords=building+microservices)
* [Implementing Domain Driven Designs](https://www.amazon.co.uk/Implementing-Domain-Driven-Design-Vaughn-Vernon/dp/0321834577/ref=sr_1_2?s=books\&ie=UTF8\&qid=1531487429\&sr=1-2\&keywords=domain+driven+design)
* [BPMN method and style](https://www.amazon.co.uk/Bpmn-Method-Style-Implementers-Guide/dp/0982368119/ref=sr_1_1?ie=UTF8\&qid=1531487366\&sr=8-1\&keywords=bpmn+method+and+style)
* [12 factor apps](http://12factor.net)
* [Beyond the 12 factor app](https://content.pivotal.io/blog/beyond-the-twelve-factor-app)
* [Kubernetes in Action](https://www.amazon.co.uk/Kubernetes-Action-Marko-Luksa/dp/1617293725/ref=sr_1_1?s=books\&ie=UTF8\&qid=1531487409\&sr=1-1\&keywords=kubernetes+in+action)