References
- Andersen H.C. Mit eget Eventyr uden Digtning. Nyt Nordisk Forlag, Copenhagen 1942; 28–28, manuscript published by Topsoe-Jensen 31
- Backman G. Die beschleunigte Entwicklung der Jugend. Acta Anatomica 1948; 4: 421–480
- Eveleth P.B., Tanner J.M. Worldwide Variation in Human Growth. Cambridge University Press, Cambridge 1976; 7–7
- Fenger E. Sjette og syvende Halvaarsberetning fra det kgl. medicinske Selskabs statistiske Comite. Bibliotek for Laeger 1850; 7: 1–17
- Hannover A. Om Menstruationens Betydning. C. A. Reitzels Forlag, Copenhagen 1851; 25–25, pp. 44–58
- Hannover A. Undersoegelser angaaende Menstruationen. C. A. Reitzels Forlag, Copenhagen 1865; 4–12
- Helm P. Menarche in Denmark from the 1830s to 1983. Ugeskrift for Laeger 1984; 146: 3902–3904
- Manniche E. Age at menarche: Nicolai Edvard Ravn's data on 3385 women in mid-19th century Denmark. Annals of Human Biology 1983; 10: 79–82
- Tanner J.M. A History of the Study of Human Growth. Cambridge University Press, Cambridge 1981; 286–287, 486–487
- Tilt E.J. Reflections on the causes which advance or retard the appearance of first menstruation in women, with a synoptical table, showing the mean age of first menstruation in 10422 women, in hot, temperate, and cold climates. The London and Edinburgh Monthly Journal of Medical Science 1850; 11: 289–296
- Tilt E.J. Uterine and Ovarian Inflammation. John Churchill, London 1862; 40–41, New Burlington Street