@inproceedings{berry05refsq,
	title = {The Four Levels of Requirements Engineering for and in Dynamic Adaptive Systems},
	address = {Porto, Portugal},
	author = {Daniel M. Berry and Betty H.C. Cheng and Ji Zhang},
	booktitle = {International Workshop on Requirements Engineering: Foundation for Software Quality},
	month = {June},
	url = {http://www.cse.msu.edu/~zhangji9/publications/Berry05Four.pdf},
	year = {2005},
	biburl = {http://www.bibsonomy.org/bibtex/2d5881b40414277617e9bf3a909b36252/neilernst},
	keywords = {adaptive dynamic software }
}