*1:See also https://sumita-m.hatenadiary.com/entry/2023/04/29/000259
*2:See also https://sumita-m.hatenadiary.com/entry/20161015/1476517356 https://sumita-m.hatenadiary.com/entry/2021/03/12/080535 https://sumita-m.hatenadiary.com/entry/2021/03/24/225140 https://sumita-m.hatenadiary.com/entry/2021/03/28/205916 https://sumita-m.hatenadiary.com/entry/2021/11/03/093539 https://sumita-m.hatenadiary.com/entry/2021/11/06/154355 https://sumita-m.hatenadiary.com/entry/2021/11/26/120919 https://sumita-m.hatenadiary.com/entry/2022/07/16/143512 https://sumita-m.hatenadiary.com/entry/2022/07/26/102211 https://sumita-m.hatenadiary.com/entry/2022/11/03/151259 https://sumita-m.hatenadiary.com/entry/2022/11/24/095028 https://sumita-m.hatenadiary.com/entry/2022/12/15/023322 https://sumita-m.hatenadiary.com/entry/2022/12/21/035644 https://sumita-m.hatenadiary.com/entry/2023/01/22/151328
