- Supreme Court of the United States | Monday, June 28, 1971 | Cited 0 times
- Supreme Court of Minnesota | Friday, June 4, 1976 | Cited 0 times
- Supreme Court of Minnesota | Friday, October 17, 1980 | Cited 0 times
- Supreme Court of the United States | Tuesday, March 19, 1985 | Cited 0 times
- Court of Appeals of Minnesota | Wednesday, January 21, 1987 | Cited 0 times