Coffman R, Kildsig D (1996). «Effect of nicotinamide and urea on the solubility of riboflavin in various solvents». J Pharm Sci. 85 (9): 951–4. PMID8877885. doi:10.1021/js960012b
Coffman R, Kildsig D (1996). «Effect of nicotinamide and urea on the solubility of riboflavin in various solvents». J Pharm Sci. 85 (9): 951–4. PMID8877885. doi:10.1021/js960012b