1. Bomba A, Sevcik A, Poldauf M. Changes in erythrocytes, serum iron and serum copper in calves and after weaning, with reference to anaemia. Veterinarstvi. 1986; 36: 227–229.
2. Bostedt H, Schramel P. Dynamics of blood concentrations of calcium, magnesium and the trace elements iron, copper, and zinc in the newborn calf. Tierarztliche Umschau. 1982; 37: 471–472, 475–476.
3. Bostedt H, Jekel E, Schramel P. Development of iron and copper concentration in blood plasma of calves during the first few days and weeks after birth, also a finding of covert neonatal iron deficiency aneamia. Deutsche Tierarztliche Wochenschrift. 1990; 97: 400–403.
4. Bostedt H, Hospes R, Wehrend A, Schramel P. Effects of the parenteral administration of iron preparations in the early development of calves. Tierarztliche Umschau. 2000; 55: 305.
5. Bunger U, Kaphangst P, Fiebig U, Schonfelder E, Jentsch D, Ponge J. Anaemia in male calves during rearing. 4. Relations between birth weight, duration of trial and body weight gain while the calves were fed on colostrums, and the blood picture during weaning. Archiv fur Tierernahrung. 1980; 30: 611–631.