Beibei Hu, Xiaomei Yu, Ling Zhang, “On the Riemann–Hilbert problem of the matrix Lakshmanan–Porsezian–Daniel system with a $4\times4$ AKNS-type matrix Lax pair”, TMF, 210:3 (2022), 387–404; Theoret. and Math. Phys., 210:3 (2022), 337–352
Yan Li, Ling Zhang, Beibei Hu, Ruiqi Wang, “The initial-boundary value for the combined Schrödinger and Gerdjikov–Ivanov equation on the half-line via the Riemann–Hilbert approach”, TMF, 209:2 (2021), 258–273; Theoret. and Math. Phys., 209:2 (2021), 1537–1551