(EN) Stephen Whyte, Man, Woman, "Other": Factors Associated with Nonbinary Gender Identification, in Archives of Sexual Behavior, vol. 47, n. 8, Heidelberg, Germany, Springer Science+Business Media, 25 settembre 2018, pp. 2397–2406, DOI:10.1007/s10508-018-1307-3, PMID 30255409.
«2 out of 7479 (0.03 percent) of respondents to the Australian Sex Survey, a 2016 online research survey, self-identified as trigender.»