Tahir, M.; Shah, S. A.; Ayub, M.; Tanveer, A.; Rehman, H.- ur-. Growth and Yield Response of Sunflower (Helianthus Annuus L.) to Sulphur and Boron Application: Effect of Sulphur and Boron on Sunflower. Pakistan Journal of Scientific & Industrial Research 2014, 57, 5-10.