Anderson SE, Dallal GE, Must A (april 2003). "Relative weight and race influence average age at menarche: results from two nationally representative surveys of US girls studied 25 years apart". Pediatrics. 111 (4 Pt 1): 844-50. doi:10.1542/peds.111.4.844. PMID12671122.
Anderson SE, Dallal GE, Must A (april 2003). "Relative weight and race influence average age at menarche: results from two nationally representative surveys of US girls studied 25 years apart". Pediatrics. 111 (4 Pt 1): 844-50. doi:10.1542/peds.111.4.844. PMID12671122.