Jareena Begam, J, et al. “Development of Gas Sensor Array Based on Phthalocyanine Functionalized Bilayer TiO2:ZnO Thin Film towards L Iver Disease Detection”. International Journal of Engineering & Technology, vol. 7, no. 2.21, Apr. 2018, pp. 232-6, https://doi.org/10.14419/ijet.v7i2.21.12179.