Logo of the CiNii<a rel="nofollow" class="external autonumber" href="http://ci.nii.ac.jp/">[1]</a>. CiNii is open repository of Japan, it is like a PubMed in US.
CiNii<a rel="nofollow" class="external autonumber" href="http://ci.nii.ac.jp/">[2]</a>
<a rel="nofollow" class="external free" href="http://ci.nii.ac.jp/">http://ci.nii.ac.jp/</a>