M. M. Ayad and A. A. El-Nasr, “Anionic dye (acid green 25) adsorption from water by using polyaniline nanotubes salt/silica composite”, J. Nanostruct. Chem., vol. 3, no. 1 (December 2013), Dec. 2012, doi: 10.1186/2193-8865-3-3.