Soykan, and O.C. Candogan. “Synthesis, Characterization and Conductivity Properties of Polystyrene/Polyacrylonitrile/Polyindole Ternary Composites”. Journal of Material Science and Technology Research 7 (March 27, 2020):  41–48. Accessed May 1, 2025. https://www.zealpress.com/index.php/jmstr/article/view/151.