V. Popkov, D. Karevski, G. M. Schütz, “Exact results for the isotropic spin-$1/2$ Heisenberg chain with dissipative boundary driving”, TMF, 198:2 (2019), 341–362; Theoret. and Math. Phys., 198:2 (2019), 296–315
A. E. Borovik, V. Yu. Popkov, V. N. Robuk, “Formation of nonlinear structures in exactly solvable dissipative
systems”, Dokl. Akad. Nauk SSSR, 305:4 (1989), 841–843; Dokl. Math., 34:4 (1989), 339–340