Item from Mathematical Reviews (American Mathematical Society)--access
their stable url through the AMS database via an institutional library:
MR2073519 (2005b:90066) Suárez-Vega, R.; Santos-Peñate,
D. R.; Dorta-González, P. Discretization and resolution of the
$(r\vert X\sb p)$-medianoid problem involving quality criteria. Top 12
(2004), no. 1, 111--133. (Reviewer: Sandra L. Arlinghaus) 90B85