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Patient Education Pamphlet: „Dysmenorrhea”. Архивирано из оригинала 30. 12. 2011. г. By American Congress of Obstetricians and Gynecologists, retrieved January 2011
Patient Education Pamphlet: „Dysmenorrhea”. Архивирано из оригинала 30. 12. 2011. г. By American Congress of Obstetricians and Gynecologists, retrieved January 2011
Patient Education Pamphlet: „Dysmenorrhea”. Архивирано из оригинала 30. 12. 2011. г. By American Congress of Obstetricians and Gynecologists, retrieved January 2011
Patient Education Pamphlet: „Dysmenorrhea”. Архивирано из оригинала 30. 12. 2011. г. By American Congress of Obstetricians and Gynecologists, retrieved January 2011
Patient Education Pamphlet: „Dysmenorrhea”. Архивирано из оригинала 30. 12. 2011. г. By American Congress of Obstetricians and Gynecologists, retrieved January 2011