Solitons in optical metamaterials with anti-cubic nonlinearityAnjan Biswas, Mehmet Ekici, Abdullah Sonmezoglu, Qin Zhou, Ali Saleh Alshomrani, Seithuti P. Moshokoa and Milivoj BelicEur. Phys. J. Plus, 133 5 (2018) 204DOI: https://doi.org/10.1140/epjp/i2018-12046-6