Pitkälä, P. “Sigurd Wettenhovi-Aspa, August Strindberg and a Dispute Concerning the Common Origins of the Languages of Mankind 1911–1912 ”. Scripta Instituti Donneriani Aboensis, Vol. 29, no. 1, June 2020, pp. 49–81, doi:10.30674/scripta.89215.