1. Oestrogene beim Menschen;Diczfalusy,1961
2. Aphorismen, Briefe, Schriften (1799);Lichtenberg,1953
3. The Life of Reason;Santayana,1905
4. The early history of the oestrogenic hormones;Corner;J. Endocr.,1964
5. The early works of Aristotle;Aristotle,1910