http://www.fben.jp/bookcolumn/2012/04/post_3239.html

http://store.kinzai.jp/book/12124.html

http://headlines.yahoo.co.jp/hl?a=20120419-00000221-mailo-l26

http://www.asahi.com/national/update/0419/TKY201204190259.html

http://www.moj.go.jp/content/000077784.pdf

http://hardware.slashdot.jp/story/12/04/18/1845256/

http://www.asahi.com/national/update/0416/TKY201204160447.html

http://book.asahi.com/reviews/reviewer/2012041500008.html

http://www.gizmodo.jp/2012/04/3d_54.html

http://www.twinbird.jp/product/ls8151/

http://headlines.yahoo.co.jp/hl?a=20120418-00000027-kana-l14

http://www.yomiuri.co.jp/e-japan/shizuoka/news/20120419-OYT8T00017.htm

http://headlines.yahoo.co.jp/hl?a=20120418-00000023-mailo-l08

http://markezine.jp/article/detail/15523

http://mainichi.jp/select/news/20120414k0000m040077000c.html

http://mainichi.jp/area/news/20120417ddn041040024000c.html

http://mainichi.jp/opinion/news/20120417ddm012070065000c.html

http://mainichi.jp/area/osaka/news/20120417ddlk27040486000c.html

http://www.namban.jp/index.html

http://mainichi.jp/feature/news/20120417ddm013100146000c.html

http://sankei.jp.msn.com/world/news/120417/erp12041721410003-n1.htm

http://www.ringolab.com/note/daiya/2012/04/post-1629.html

http://homepage3.nifty.com/hamachan/20111226092623228.pdf

http://headlines.yahoo.co.jp/hl?a=20120418-00000015-jij-soci

http://osaka.yomiuri.co.jp/e-news/20120411-OYO1T00718.htm

http://gigazine.net/news/20120416-difff/

http://news.goo.ne.jp/article/topbrain/bizskills/topbrain_223.html?fr=rk

http://rocketnews24.com/2012/04/09/201103/

http://www.jiji.com/jc/c?g=eco_30&k=2012041600636

http://www.asahi.com/international/jinmin/TKY201203220382.html