BibTex format
@article{Brody:2017:1751-8121/aa91e2,
author = {Brody, DC},
doi = {1751-8121/aa91e2},
journal = {JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL},
title = {PT-symmetry, indefinite metric, and nonlinear quantum mechanics},
url = {http://dx.doi.org/10.1088/1751-8121/aa91e2},
volume = {50},
year = {2017}
}