"Petre i Hofors, K Casimir". Tvåkammar-riksdagen 1867–1970 (in Swedish). Vol. 5. p. 166. Archived from the original on 16 February 2022. Retrieved 5 April 2023 – via Svenskt porträttarkiv.
"Petre i Hofors, K Casimir". Tvåkammar-riksdagen 1867–1970 (in Swedish). Vol. 5. p. 166. Archived from the original on 16 February 2022. Retrieved 5 April 2023 – via Svenskt porträttarkiv.