V. Veeraprathap and  G. S. Harish and  G. Narendra Kumar,  Lung Cancer Detection and Multi Level Classification Using Discrete Wavelet Transform Approach.   journal   = {International Journal of Biomedical and Biological Engineering}, [online]. World Academy of Science, Engineering and Technology.
     2020, vol. 157(1). 17 - 23
    [viewed 18 February 2020]. Available from: https://publications.waset.org/pdf/10011002.