[1] ( ( 版)) http://aska-r.aasa.ac.jp/dspace/bitstream/10638/1037/1/0005-031-200803-001-037.pdf
[2] BA8697693X_1_397_430.pdf, , http://repository.nabunken.go.jp/dspace/bitstream/11177/7980/1/BA8697693X_1_397_430.pdf#page=17
[3] ho02_04229_0003.pdf, , https://archive.wul.waseda.ac.jp/kosho/ho02/ho02_04229/ho02_04229_0003/ho02_04229_0003.pdf#page=10