Mohd Azman A. Nurul and  Husni Shafik and  Almajano P. Maria and  Gallego G. Maria,  Solvent Effect on Antioxidant Activity and Total Phenolic Content of Betula alba and Convolvulus arvensi.   journal   = {International Journal of Biotechnology and Bioengineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2013, vol. 77(5). 351 - 356
    [viewed 19 March 2024]. Available from: https://publications.waset.org/pdf/9996837.