Ar-Rashid, M.; Islam, N.; Ahmad, H. .; Zakaria, C. M. .; Banu, L. A.; Islam, N.; Zamir, R. Investigation of Water-Soluble Preservatives in Frequently Used Energy-Stimulating Herbal Drugs in Rajshahi City, Bangladesh. J. Appl. Sci. Process Eng. 2024, 11, 1-12.