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Birkhäuser, M; Braendle, W; Keller, P J; Kiesel, L; Kuhl, H; Neulen, J (2006). [Recommendations for hormonal contraception. 34. Workshop of the "Zurich Discussion Circle", April 2005]. Gynäkologisch-geburtshilfliche Rundschau, 46(1-2), pp. 58-63. Basel: Karger

Birkhäuser, M; Braendle, W; Keller, P J; Kiesel, L; Kuhl, H; Neulen, J (2006). [Recommendations for estrogen and progesterone replacement in climacteric and postmenopause. 33. Workshop of the "Zurich Discussion Circle", October 2004]. Gynäkologisch-geburtshilfliche Rundschau, 46(1-2), pp. 53-7. Basel: Karger