The following publications are possibly variants of this publication:
- The median function on distributive semilatticesFred R. McMorris, Robert C. Powers. endm, 2:179, 1999. [doi]
- The median function on median graphs and semilatticesFred R. McMorris, Henry Martyn Mulder, Robert C. Powers. DAM, 101(1-3):221-230, 2000.
- Majority decision on median semilatticesFred R. McMorris, Robert C. Powers. mss, 65(1):48-51, 2013. [doi]