Ibrahim A. Al-Muhaisen and  Mohammad N. Al Ymemeni,  Harmful Effect of Ambient Ozone on Growth and Productivity of Two Legume Crops Visia Faba, and Pisum sativum in Riyadh City, K.S.A..   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 393 - 398
    [viewed 18 October 2021]. Available from: https://publications.waset.org/pdf/11731.