1. Cohn, M.: Agile Estimating and Planning. Prentice-Hall, Upper Saddle River (2006)
2. Cockburn, A.: Crystal Clear a Human-Powered Methodology for Small Teams. Addison Wesley, Upper Saddle River (2004)
3. Highsmith, J.: Agile Project Management, 2nd edn. Addison-Wesley, Upper Saddle River (2010)
4. Brechner, E.: Agile Project Management with Kanban (2006)
5. Andersen, E.: Warning: activity planning is hazardous to your project’s health!. Int. J. Project Manag., 89–94 (1996)