“Finding the Necessary Conditions for the Existence of the Dark Soliton Solution to the Vakhnenko-Parkes Equation with Variable Coefficients and with Power Law Nonlinearity” (2020) Latakia University Journal -Basic Sciences Series, 42(5). Available at: https://journal.latakia-univ.edu.sy/index.php/bassnc/article/view/10178 (Accessed: 5 May 2026).