SKOČOVSKÝ, Karel. Fertility Awareness-based Methods of Conception Regulation: Determinants of Choice and Acceptability. 1st ed. Brno: Masarykova univerzita, 2008, 128 pp. ISBN 978-80-210-4624-5.
UNZEITIG, Vít. Contraception for the premenopausal women. In Contraception and Family Planning. London: Elsevier, 2005, p. 143-153, 206 pp. European Practice in Gynaecology and Obstetrics.
BOUREK, Aleš. The Internet Impact on Contraception. Hague: Parthenon Press, 1998, 1 pp. The European Journal of Contraception & Reprod. H. ISSN-1362-5187.