B. Sreenivasa Rao, S. Shankar Dube, A. Nagendrakumar, and B. Srinivasa Reddy, “Effect of Non-ionic Surfactant (Triton X-100) on the Spectrophotometric Determination of Lead(II) with Potassium Benzyl Xanthate”, ajc, vol. 22, no. 10, pp. 7567–7572, Jul. 2010.