@inbook{122221,
author={David T. Schwartz},
title={Chapter II-2. Large Bowel Obstruction},
booktitle={Emergency Radiology: Case Studies},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2008},
url={accessemergencymedicine.mhmedical.com/content.aspx?aid=122221}
}