Hänscha, Robert & Mendel Ralf R. (2009). »Physiological functions of mineral micronutrients (Cu, Zn, Mn, Fe, Ni, Mo, B, Cl)«. Current Opinion in Plant Biology. Zv. 12, št. 3. str. 259–266. doi:10.1016/j.pbi.2009.05.006. ISSN1369-5266.
Hänscha, Robert & Mendel Ralf R. (2009). »Physiological functions of mineral micronutrients (Cu, Zn, Mn, Fe, Ni, Mo, B, Cl)«. Current Opinion in Plant Biology. Zv. 12, št. 3. str. 259–266. doi:10.1016/j.pbi.2009.05.006. ISSN1369-5266.