Changes in plasma testosterone, thyroxine and triiodothyronine in relation to sperm production and remex moult in domestic ganders M. Zeman, J. Košutzký, Ľ Miček and A. Lengyel Reprod. Nutr. Dev., 30 4 (1990) 549-557 DOI: 10.1051/rnd:19900410