@conference {Gujar10, title = {Dynamic Matching with a Fall-Back Option}, booktitle = {Proceedings of the 19th European Conference on Artificial Intelligence (ECAI{\textquoteright}10)}, year = {2010}, pages = {263-268}, url = {http://econcs.seas.harvard.edu/files/econcs/files/gujar10.pdf}, author = {Sujit Gujar and David C. Parkes} }