Nisar Ahmed Memon and  Anwar Majid Mirza and  S.A.M. Gilani,  Deficiencies of Lung Segmentation Techniques using CT Scan Images for CAD.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2008, vol. 20(8). 2764 - 2769
    [viewed 08 December 2019]. Available from: https://publications.waset.org/pdf/6510.