VELTMAN, Clare J; WILLIAMS, Murray. Diurnal use of time and space by breeding Blue Duck Hymenolaimus malacorhynchos. Wildfowl, [S. l.], p. 62–74, 1990. Disponível em: https://tidsskrift.dk/Wildfowl/article/view/154050. Acesso em: 16 dec. 2025.