S. P.  Gaikwad, Pasricha, R., and Ravi, V., ?Preparation of nanocrystalline ferroelectric CaBi2Ta2O9 by the urea method?, Ceramics International, vol. 31, no. 6, pp. 773-775, 2005.

M.  Anilkumar, Pasricha, R., and Ravi, V., ?Synthesis of bismuth oxide nanoparticles by citrate gel method?, Ceramics International, vol. 31, no. 6, pp. 889-891, 2005.