Vyas, P.C., and V.P. Mittal. “Spectrophotometric Determination of Praseodymium(III) After Extraction With 8-Quinolinol and Its Halogen Derivatives into Molten Naphthalene”. Asian Journal of Chemistry 2, no. 3 (March 30, 2010): 239–244. Accessed October 3, 2024. https://asianpubs.org/index.php/ajchem/article/view/25316.