Ruming Yin and  Jian Yuan and  Qiuhua Yang and  Xiuming Shan and  Xiqin Wang,  Linear Cryptanalysis for a Chaos-Based Stream Cipher.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2009, vol. 36(12). 2361 - 2366
    [viewed 06 April 2020]. Available from: https://publications.waset.org/pdf/12215.