WASET
    Thitiporn Machikowa and  Thanawit Kulrattanarak and  Sodchol Wonprasaid,  Effects of Ultrasonic Treatment on Germination of Synthetic Sunflower Seeds.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2013, vol. 73(1). 1 - 3
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/482.