Symmetric and antisymmetric surface plasmon polariton solitons in a metal-dielectric-metal waveguide with incoherent pumpingZhenning Gu, Qi Liu, Yong Zhou and Chaohua TanEur. Phys. J. D, 74 4 (2020) 78DOI: https://doi.org/10.1140/epjd/e2020-100606-8