@inproceedings{boerkoel2008hybrid,
 author = {Boerkoel,Jr., James C. and Durfee, Edmund H.},
 title = {Hybrid constraint tightening for solving hybrid scheduling problems},
 booktitle = {Proceedings of the 23rd national conference on Artificial intelligence (AAAI-08)},
 year = {2008},
 pages = {1446--1449},
 location = {Chicago, Illinois},
 publisher = {AAAI Press},
 }