@INPROCEEDINGS{Absi2008d,
  author = {N. Absi and S. Dauz\`ere-P\'er\`es and S. Kedad-Sidhoum},
  title = {Lot-sizing Problems with Time Windows and Shortages},
  booktitle = {International Federation of Operational Research Societies Conference},
  year = {2008},
  month = {July}
}