Kusumawati, N., et al. “Expansion of Hand Hygiene Compliance and Decreasing Counterfeiting of Sanitation Products in the Era of the COVID-19 through Diversification and Standardization of Alcohol-Based Gel and Wipes Hand Sanitizer”. International Journal on Advanced Science, Engineering and Information Technology, vol. 12, no. 1, Jan. 2022, pp. 411-22, doi:10.18517/ijaseit.12.1.13940.