@inbook{Cohen_1989,
title={OH-IR Sources and the Galactic Centre Distance},
ISBN={9789400923621},
url={http://dx.doi.org/10.1007/978-94-009-2362-1_5},
DOI={10.1007/978-94-009-2362-1_5},
booktitle={The Center of the Galaxy},
publisher={Springer Netherlands},
author={Cohen,
R. J. and Shepherd,
M. and Gaylard,
M. J. and West,
M. E.},
year={1989},
pages={51–54} }