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- ISO/IEC 9899-1999 Section 7.20.3.2, The free function
- Seacord 05 Chapter 4, Dynamic Memory Management
- Kerrighan 88 Section 7.8.5, Storage Management
- OWASP, Using freed memory http://www.owasp.org/index.php/Using_freed_memory
- Viega 05 Section 5.2.19 Using freed memory