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Biro, Frank; Galvez, MP; Greenspan, LC; Succop, PA; Vangeepuram, N (tháng 9 năm 2010), "Pubertal assessment method and baseline characteristics in a mixed longitudinal study of girls", Pediatrics, 126 (3): e583-90, doi:10.1542/peds.2009-3079, PMC4460992, PMID20696727
Biro, Frank; Galvez, MP; Greenspan, LC; Succop, PA; Vangeepuram, N (tháng 9 năm 2010), "Pubertal assessment method and baseline characteristics in a mixed longitudinal study of girls", Pediatrics, 126 (3): e583-90, doi:10.1542/peds.2009-3079, PMC4460992, PMID20696727