Joan Boyar Kim S. Larsen Morten N. Nielsen The Accommodating Function - A Generalization of the Competitive Ratio. 74-79 http://link.springer.de/link/service/series/0558/bibs/1663/16630074.htm 1999 conf/wads/1999 WADS db/conf/wads/wads99.html#BoyarLN99