Harmainen, Antti. “’The One and Only True and Salvational faith’: The Synthesis of Kulturprotestantismus, German Humanism and Western Esotericism in Carl Robert Sederholm’s Written Work of Early 1880s”. Approaching Religion 8, no. 1 (April 21, 2018): 5–16. Accessed November 30, 2021. https://journal.fi/ar/article/view/66727.