Ascorbate-2-sulfate as a dietary vitamin C source for Atlantic salmon (Salmo salar): 2. Effects of dietary levels and immunization on the metabolism of trace elements - Maage, Amund; Waagbø, Rune; Olsson, Per Erik; Julshamn, Kaare; Sandnes, Kjartan (Fish Physiology and Biochemistry, 1990)