N. NARENDER, R. S. MALIK, R. P. NARWAL, R. R. DAHIYA, and O. P. SANDHU, “Distribution and plant availability of soil copper fractions to oat (Avena sativa) nutrition in Haryana soils”, Indian J Agri Sci, vol. 84, no. 10, pp. 1205–10, Oct. 2014, doi: 10.56093/ijas.v84i10.44136.