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HADJIAN, A., ZOGRAPHOPOULOS, N. B. and AFROUZI, Ghasem Alizadeh. Multiple nonsemitrivial solutions for a class of degenerate quasilinear elliptic systems. Topological Methods in Nonlinear Analysis. Online. 1 June 2015. Vol. 45, no. 2, pp. 385 - 397. [Accessed 22 July 2024]. DOI 10.12775/TMNA.2015.019.