كروم ر. 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]. 2020Dec.7 [cited 2024May18];42(5). Available from: https://journal.tishreen.edu.sy/index.php/bassnc/article/view/10178