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. TUJ-BA [Internet]. 2020 Dec. 7 [cited 2026 May 5];42(5). Available from: https://journal.latakia-univ.edu.sy/index.php/bassnc/article/view/10178