Brian C. Hales discusses polyandry in Joseph Smith's plural marriages.
Brian C. Hales, “The Puzzlement of 'Polyandry',” in The Persistence of Polygamy: Joseph Smith and the Origins of Mormon Polygamy, ed. Newell G. Bringhurst and Craig L. Foster (Independence, Mo.: John Whitmer Books, 2010), 99–152
Historical evidence indicates that Joseph Smith was sealed to several women who had legal husbands. Generally called “polyandry,” this paper will explore these relationships, attempting to discern the nature of the marriages. Polyandry will be discussed in light of early Mormon teachings concerning morality and marriage. The possibility of polyandrous sexual relations existing in these unions will be investigated.