WIDNÄS, M. Vladimir Solovjovs mystisches Erlebnis. Scripta Instituti Donneriani Aboensis, [S. l.], v. 5, p. 125–140, 1970. DOI: 10.30674/scripta.67623. Disponível em: https://journal.fi/scripta/article/view/67623. Acesso em: 23 may. 2022.