Vengavasi, K., and R. Pandey. “Root Acidification, a Rapid Method of Screening Soybean Genotypes for Low-Phosphorus Stress”. INDIAN JOURNAL OF GENETICS AND PLANT BREEDING, vol. 76, no. 02, May 2016, pp. 213-6, doi:10.5958/0975-6906.2016.00025.0.