*1:See also https://sumita-m.hatenadiary.com/entry/20160329/1459230069 https://sumita-m.hatenadiary.com/entry/20160404/1459698277 https://sumita-m.hatenadiary.com/entry/20170409/1491754765 https://sumita-m.hatenadiary.com/entry/20171218/1513619689
*2:See also https://sumita-m.hatenadiary.com/entry/2020/07/16/014629 https://sumita-m.hatenadiary.com/entry/2020/07/24/081421 https://sumita-m.hatenadiary.com/entry/2021/04/09/075443 https://sumita-m.hatenadiary.com/entry/2021/12/20/092548
