- Supreme Court of Minnesota | Friday, November 19, 1971 | Cited 0 times
- Court of Appeals of Minnesota | Tuesday, October 22, 1996 | Cited 0 times
- Court of Appeals of Minnesota | Tuesday, July 13, 1999 | Cited 0 times
- Supreme Court of the United States | Monday, December 11, 1972 | Cited 0 times