Fowziya AWS, Fazeenah AHA, Manuha MI, Thennakoon. Comparative study on efficacy on sharbat-e-sont and zimad-e-rai with zimad-e-rai alone on Iltihab-e-khaishoom muzmin (chronic sinusitis). 3rd International Conference on Medicinal Plant ad Herbal products. December 2011, Sri Lanka