Dulal, M. M., M. K. Islam, A. A. Chowdhury, and J. A. Chowdhury. “Prevention of Cap-Locking of Syrup Product by Treating the Manufacturing Process of Sugar Syrup With Citric Acid Monohydrate”. Bangladesh Pharmaceutical Journal, vol. 19, no. 2, Aug. 2016, pp. 190-6, doi:10.3329/bpj.v19i2.29279.