Kullanart Obsuwan and  Suluck Namchote and  Natdhera Sanmanee and  Kamolchanok Panishkan and  Sirichai Dharmvanij,  Effect of Various Concentrations of Humic Acid on Growth and Development of Eggplant Seedlings in Tissue Cultures at Low Nutrient Level.   journal   = {International Journal of Bioengineering and Life Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2011, vol. 56(8). 494 - 496
    [viewed 05 August 2020]. Available from: https://publications.waset.org/pdf/8836.