1. Li Fang: Research of the Key Technology of Linux B2 Operating System, Dissertation, Bei Jing Science & Technology University, (2004).
2. Li Fang, Fan Yumei, Hu Zhixing: The Research and Design of Security Model. Journal of CONTROL& AUTOMATION, Vol. 20 (9), pp.126-128, (2004).
3. Liu Haiyan, Wang Ziqiang, Shao Lisong: Analysis of security test and reinforcing technology of linux systems. Journal of COMPUTER ENGINEERING AND DESIGN, Vol. 26(1), pp.100-103, (2005).
4. Lian Shucheng, Xu Jingdong, Zan Shigang: Research of Application Layer Protocol Filter Method Based on Connection Tracking Mechanism of Linux Firewall. Journal of COMPUTER ENGINEERING AND APPLICATIONS, Vol. 41(13), pp.129-132(2005).
5. Xia Li: The Analysis of Linux Current Security Technique. Journal of Network & Computer Security, Vol. 7, pp.32-35, (2007).