Risto Saarinen has updated his extensive bibliography on Finnish Luther studies. This may be the last update for reasons noted in the blog:
I do not have plans to follow this documention beyond 2017. As Finnish Luther studies have meanwhile become mainline research, it does not make sense to treat them as distinct school any longer. In its very many entries, the new Oxford Encyclopedia of Martin Luther (2017) offers abundant discussion on various features of the Finnish school, integrating them to mainline research.
See https://blogs.helsinki.fi/ristosaarinen/luther-studies-in-finland/