Skoromnik, Oleg Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society,;
https://link.aps.org/doi/10.1103/PhysRevA.96.052102 (Verlagsversion)
1708.01123.pdf (Preprint), 628KB
Skoromnik, O., & Feranchuk, I. D. (2017). Analytic approximation for eigenvalues of a class of PT symmetric Hamiltonians. Physical Review A, 96(5): 052102. doi:10.1103/PhysRevA.96.052102.