*1:See also https://sumita-m.hatenadiary.com/entry/20150724/1437745163 https://sumita-m.hatenadiary.com/entry/20160226/1456500410 https://sumita-m.hatenadiary.com/entry/20160228/1456620646 https://sumita-m.hatenadiary.com/entry/20160905/1473001572 https://sumita-m.hatenadiary.com/entry/2020/02/10/163149 https://sumita-m.hatenadiary.com/entry/2020/02/12/020430 https://sumita-m.hatenadiary.com/entry/2020/02/19/102512 https://sumita-m.hatenadiary.com/entry/2020/04/02/095218 https://sumita-m.hatenadiary.com/entry/2020/04/10/102333 https://sumita-m.hatenadiary.com/entry/2020/05/06/110825 https://sumita-m.hatenadiary.com/entry/2020/05/28/033930 https://sumita-m.hatenadiary.com/entry/2020/09/02/221828 https://sumita-m.hatenadiary.com/entry/2020/09/16/124156 https://sumita-m.hatenadiary.com/entry/2020/10/01/094838 https://sumita-m.hatenadiary.com/entry/2020/10/12/161525 https://sumita-m.hatenadiary.com/entry/2021/02/25/141659
