1. Klaar is Kees: Een Nieuwe Visie op Vroegtijdige Zaadlozing;Waldinger,1999
2. Waldinger, M.D.: When Seconds Count. Selective Serotonin Reuptake Inhibitors and Ejaculation. Thesis, Utrecht, The Netherlands, chapt. 1, p. 11, 1997
3. Practical Treatise on Impotence and Sterility;Gross,1887
4. Psychopathia Sexualis;von Krafft-Ebing,1901
5. Ueber Ejaculatio Praecox;Abraham;Zeitschr Aerztl Psychoanal,1917