Lodahl, M.A. og Miltersen, E.H. 2021. Is the Gender Binary System a Biological Fact or a Social Norm? Modified chapter from the book “Inappropriate Behaviour” (Upassende Opførsel). Kvinder, Køn & Forskning. 29, 1 (feb. 2021), 91–98. DOI:https://doi.org/10.7146/kkf.v29i2.124905.