De Sanctis, Vincenzo, et al. “Hypomenorrhea in Adolescents and Youths: Normal Variant or Menstrual Disorder? Revision of Literature and Personal Experience : Hypomenorrhea in Adolescents and Youths”. Acta Biomedica Atenei Parmensis, vol. 93, no. 1, Mar. 2022, p. e2022157, https://doi.org/10.23750/abm.v93i1.12804.