Christine O. Wangia and  Jennifer A. Orwa and  Francis W. Muregi and  Patrick G. Kareru and  Kipyegon Cheruiyot and  Eric Guantai,  Quantitative and Fourier Transform Infrared Analysis of Saponins from Three Kenyan Ruellia Species: Ruellia prostrata, Ruellia lineari-bracteolata and Ruellia bignoniiflora .   journal   = {International Journal of Biological and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2018, vol. 138(6). 155 - 159
    [viewed 10 May 2024]. Available from: https://publications.waset.org/pdf/10009093.