Anderson SE, Dallal GE, Must A (2003). "Relative weight and race influence average age at menarche: results from two nationally representative surveys of US girls studied 25 years apart". Pediatrics111 (4 Pt 1): 844–50. PMID12671122. doi:10.1542/peds.111.4.844.
Anderson SE, Dallal GE, Must A (2003). "Relative weight and race influence average age at menarche: results from two nationally representative surveys of US girls studied 25 years apart". Pediatrics111 (4 Pt 1): 844–50. PMID12671122. doi:10.1542/peds.111.4.844.
Hamilton-Fairley, Diana. "Obstetrics and Gynaecology"(PDF). Blackwell Publishing (2ª ed.). Arquivado dende o orixinal(PDF) o 09 de outubro de 2018. Consultado o 17 de xaneiro de 2018.
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Hamilton-Fairley, Diana. "Obstetrics and Gynaecology"(PDF). Blackwell Publishing (2ª ed.). Arquivado dende o orixinal(PDF) o 09 de outubro de 2018. Consultado o 17 de xaneiro de 2018.