@INPROCEEDINGS{Absi2006b,
  author = {N. Absi and S. Kedad-Sidhoum},
  title = {Capacitated lot-sizing problem with setup times, stock and demand
	shortages},
  booktitle = {12th IFAC Symposium on Information Control Problems in Manufacturing
	INCOM'2006},
  year = {2006},
  pages = {185--190},
  month = {May},
  url = {ABSI-INCOM2006.pdf} 
}