Boris F Samsonov, “Scattering cross-section resonance originating from a spectral singularity”, J. Phys. A: Math. Theor., 44, № 39, 2011, 392001
N Fernández-García, E Hernández, A Jáuregui, A Mondragón, “Exceptional points of a Hamiltonian of von Neumann–Wigner type”, J. Phys. A: Math. Theor., 46, № 17, 2013, 175302
G. Zhang, X. Q. Li, X. Z. Zhang, Z. Song, “Transmission phase lapse in the non-Hermitian Aharonov-Bohm interferometer near the spectral singularity”, Phys. Rev. A, 91, № 1, 2015, 012116
Peter N. Meisinger, Michael C. Ogilvie, “PT symmetry in classical and quantum statistical mechanics”, Phil. Trans. R. Soc. A., 371, № 1989, 2013, 20120058
X Z Zhang, G R Li, Z Song, “Spectral singularity in composite systems and simulation of a resonant lasing cavity”, J. Phys. A: Math. Theor., 50, № 40, 2017, 405302