*1:See also https://sumita-m.hatenadiary.com/entry/2021/11/21/221652 https://sumita-m.hatenadiary.com/entry/2021/11/26/122100
*2:See also https://sumita-m.hatenadiary.com/entry/2020/07/13/012606 https://sumita-m.hatenadiary.com/entry/2020/11/10/014804 https://sumita-m.hatenadiary.com/entry/2021/02/12/100711 https://sumita-m.hatenadiary.com/entry/2021/03/24/103559 https://sumita-m.hatenadiary.com/entry/2021/10/21/015012
