Supanyika Sengsai and  Aree Thongpukdee and  Chalermchai Kanchanakachen,  Morphological Study of Trichomes in Indigofera wightii Grah. ex Wigh & Arn., Indigo Dye Species, Traditionally Used by “Thaisongdam” Thailand.   journal   = {International Journal of Bioengineering and Life Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2014, vol. 91(7). 705 - 709
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/9998829.