@article{weko_40212_1,
author = "Kusuoka,Shigeo and Nakayama,Toshiyuki",
title = "On a Certain Metric on the Space of Pairs of a Random Variable and a Probability Measure",
journal = "Journal of mathematical sciences, the University of Tokyo",
year = "2001",
volume = "8",
number = "2",
pages = "343--356"
}