“Theoretical Study of The Dispersion Spectrum of A Two-Dimensional (2D) Roton Subjected To A Van Der Waals Field Generated by The Atoms of A Solid Graphite Substrate”. 2026. Latakia University (formerly Tishreen) Journal for Research and Scientific Studies - Basic Sciences Series 48 (3): 189-206. https://journal.latakia-univ.edu.sy/index.php/bassc/article/view/21801.