M. Jarke, K. Pohl, C. Rolland, and J. Schmitt. Methods and Associated Tools for the Information Systems Life Cycle, volume A-55 of IFIP Transactions, page 1-27. Elsevier, (1994)
M. Jarke, and K. Pohl. The Impact of Computer Supported Technologies in Information Systems Development, volume A-8 of IFIP Transactions, page 345-375. North-Holland, (1992)