V. Mittal and P. Vyas, “Mixed Ligand Complexes of Praseodymium(III) with 8-Quinolinol and 1,10-Phenanthroline or 2,2´ -Bipyridyl into Molten Naphthalene ”, ajc, vol. 4, no. 2, pp. 402–404, Mar. 2010.