Abdulkareem Hamid and  Adam Daïch,  Synthesis of Analogue to Camptothecine.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2011, vol. 49(1). 61 - 64
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/15220.