https://publications.bof.fi/handle/10024/44818
https://publications.bof.fi/handle/10024/44822
https://publications.bof.fi/handle/10024/45217
https://publications.bof.fi/handle/10024/45666
https://publications.bof.fi/handle/10024/45700
https://publications.bof.fi/handle/10024/44871