Alva, S., et al. “SYNTHESIS AND CHARACTERIZATION OF TOLUENE SULFONIC ACID (TSA)-DOPED POLYPYRROLE NANOPARTICLES: EFFECTS OF DOPANT CONCENTRATIONS”. International Journal of Innovation in Mechanical Engineering and Advanced Materials, vol. 2, no. 1, Aug. 2016, pp. 1-9, doi:10.22441/ijimeam.v2i1.18944.