Muhammad Ismail and Azeem Akram (2026) “WHEN DOES GRAPH-STRUCTURED MEMORY HELP MULTI-SESSION LLM AGENTS? AN EMPIRICAL STUDY OF HYGRAM, A HYBRID GRAPH–VECTOR MEMORY ARCHITECTURE”, Spectrum of Engineering Sciences, 4(6), pp. 2901–2914. Available at: https://www.thesesjournal.com/index.php/1/article/view/3354 (Accessed: 27 June 2026).