1. Existing Workflow systems. https://s.apache.org/existing-workflow-systems
2. bio-tools/biotoolsSchema, December 2019. https://github.com/bio-tools/biotoolsSchema , original-date: 2015-05-05T15:52:46Z
3. Workflow Description Language (WDL), April 2020. https://github.com/openwdl/wdl , original-date: 2012–08-01T03:12:48Z
4. Amstutz, P., Crusoe, M.R., Tijanić, N., et al.: Common Workflow Language, v1.0, July 2016
5. Atkinson, M., Gesing, S., Montagnat, J., Taylor, I.: Scientific workflows: past, present and future. Future Gener. Comput. Syst. 75, 216–227 (2017)