Item from Mathematical Reviews (American Mathematical Society)--access
their stable url through the AMS database via an institutional library:
MR1806523 (2001h:90011) Üster, Halit; Love, Robert F. On the
directional bias of the $\scr l\sb {bp}$-norm. European J. Oper. Res.
128 (2001), no. 3, 664--673. (Reviewer: Sandra L. Arlinghaus) 90B06
(90B10 91D20)