@article{article0e7794d3,
title   = {Unitary quantum evolution for time-dependent quasi-Hermitian systems with nonobservable Hamiltonians},
author = {Fring, Andreas and Moussa, Miled Hassan Youssef},
year = {2016},
doi = {10.1103/PhysRevA.93.042114},
journal   = {Physical Review A}
}