@misc{becker_molecular_clouds_1990, 
author={Becker, R.},
title={Molecular clouds and star formation in irregular galaxies (Dissertation)},
year={1990},
howpublished = {doctoral thesis: Universitaet Bonn},
note = {Becker, R.: Molecular clouds and star formation in irregular galaxies (Dissertation). Universitaet Bonn, 1990.}}