@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040212,
 author = {Kusuoka, Shigeo and Nakayama, Toshiyuki},
 issue = {2},
 journal = {Journal of mathematical sciences, the University of Tokyo},
 month = {},
 note = {application/pdf},
 pages = {343--356},
 title = {On a Certain Metric on the Space of Pairs of a Random Variable and a Probability Measure},
 volume = {8},
 year = {2001}
}