*1:See also https://sumita-m.hatenadiary.com/entry/20120310/1331389760 https://sumita-m.hatenadiary.com/entry/20130417/1366211836 https://sumita-m.hatenadiary.com/entry/20141019/1413647417 https://sumita-m.hatenadiary.com/entry/20160731/1469923327 https://sumita-m.hatenadiary.com/entry/20160924/1474733349 https://sumita-m.hatenadiary.com/entry/20161011/1476112393 https://sumita-m.hatenadiary.com/entry/20161015/1476517356 https://sumita-m.hatenadiary.com/entry/20161020/1476979958 https://sumita-m.hatenadiary.com/entry/20170311/1489196058 https://sumita-m.hatenadiary.com/entry/20170406/1491491310 https://sumita-m.hatenadiary.com/entry/20170514/1494786317 https://sumita-m.hatenadiary.com/entry/20181005/1538730662 https://sumita-m.hatenadiary.com/entry/2020/03/22/141524 https://sumita-m.hatenadiary.com/entry/2020/06/01/145035
