Sultana, S., Ohidullah, M., Saifuddin, A. and Hossain, M. S. (2015) “Comparative studies of hydration behaviour and density of Pyrrolidone K-30, PEG 6000 and PEG 20000”, Bangladesh Pharmaceutical Journal, 18(1), pp. 48–52. doi: 10.3329/bpj.v18i1.23515.