Amir Ngah and  Masita Abdul Jalil and  Zailani Abdullah,  Designing a Tool for Software Maintenance.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2015, vol. 98(2). 515 - 520
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/10001123.