Wangia, C. , Orwa, J. , Muregi, F. , Kareru, P. , Cheruiyot, K. , Guantai, E. (2018). 'Quantitative and Fourier Transform Infrared Analysis of Saponins from Three Kenyan Ruellia Species: Ruellia prostrata, Ruellia lineari-bracteolata and Ruellia bignoniiflora '. World Academy of Science, Engineering and Technology, Open Science Index 138, International Journal of Biological and Ecological Engineering, 12(6), 155 - 159.