The Mystery of the House of Royal Women: Royal Pīlagšīm as Secondary Wives in the Old Testament (Acta Universitatis Upsaliensis, Studia Semitica Upsaliensia 23)

[...] D. proposes to utilize several approaches, including linguistic, narrative, and intertextual, and seeks to present the ways in which these are used. Among her conclusions, D. states that the sequence in which the pîlagsîm and nâsîm are mentioned is indicative of their relative status, and that identifying the number of women in the subgroups signals the king's power or vitality (larger numbers indicate more power).