- http://conferences.unicom.co.uk/balancing-devops/
- https://www.slideshare.net/devopsguys/dev-opsguys-devops-101-for-recruiters/19-CALMS_ModelCultureAutomationLean_Hearts_Minds_Embrace
- https://futroninc.com/2015/06/keep-c-a-l-m-s-and-be-agile/
- https://devopscollective.org/automation-is-not-devops/
- https://www.forrester.com/report/CALMSS+A+Model+For+Assessing+Modern+Service+Delivery/-/E-RES122633#