Cite
Sen’s theorem for hierarchies
MLA
Powers, Robert C. “Sen’s Theorem for Hierarchies.” European Journal of Combinatorics, vol. 29, no. 5, July 2008, pp. 1257–61. EBSCOhost, https://doi.org/10.1016/j.ejc.2007.06.002.
APA
Powers, R. C. (2008). Sen’s theorem for hierarchies. European Journal of Combinatorics, 29(5), 1257–1261. https://doi.org/10.1016/j.ejc.2007.06.002
Chicago
Powers, Robert C. 2008. “Sen’s Theorem for Hierarchies.” European Journal of Combinatorics 29 (5): 1257–61. doi:10.1016/j.ejc.2007.06.002.