What is Business Process Management: A Two Stage Literature Review of an Emerging Field - Charles Møller; Carsten J. Maack; Rune D. Tan (Research and Practical Issues of Enterprise Information Systems II, Volume 1, IFIP TC 8 WG 8.9 International Conference on Research and Practical Issues of Enterprise Information Systems (CONFENIS 2007), October 14-16, 2007, Beijing, China, 2007)