Modulational instability and associated multiple dark solitons in relativistically degenerate electron-positron-ion plasmas. - Jahangir, R.; Masood, W.; Siddiq, M.; Batool, N.; Ullah, Shakir; Al-Ghamdi, Hanan; Tiofack, C. G. L.; El-Tantawy, Samir A. (Scientific Reports, 2025)