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<ahref="https://plu.mx/plum/a/?doi=10.1007%2Fs11082-018-1445-9"data-popup="right"data-size="large"class="plumx-plum-print-popup"data-site="plum"data-hide-when-empty="true">Analytical solutions of nonlinear Klein–Gordon equation using the improved F-expansion method</a>
