Item from Mathematical Reviews (American Mathematical Society)--access
their stable url through the AMS database via an institutional library:
MR1866408 (2003c:91049) Klaus, Bettina Target rules for public choice
economies on tree networks and in Euclidean spaces. Theory and Decision
51 (2001), no. 1, 13--29. (Reviewer: Sandra L. Arlinghaus) 91B18 (05C05
90B80)