MERRILL, Peter C. Hans Stoltenberg: Painter of Rural Wisconsin. Yearbook of German-American Studies, [S. l.], v. 27, p. 91–98, 1992. DOI: 10.17161/ygas.v27i.19229. Disponível em: https://journals.ku.edu/ygas/article/view/19229.. Acesso em: 16 may. 2024.