1. Vermeulen A. Why andropause? Reproductive hormones in senescent males. Orgyn. Organon's Magazine on Women & Health. 1997; VIII: 12–15
2. Schuhmayer W. Male climacterium. Myth or reality? Partial androgen deficiency. Orgyn. Organon's Magazine on Women & Health. 1997; VIII: 15–18
3. Beyond the Natural Body