@article{Saito2001,
author = {Saito, Y.},
title= {Kenko Jotai Betsu Yomyo No Nenji Suii: 1992 Nen, 1995 Nen, 1998 Nen},
year = {2001},
journal = {Jinko Mondai Kenkyu},
volume = {57},
pages = {31--50},
}