@article{walker_wardle_2019, 
  title={Cosmic Snow Clouds: Self-gravitating Gas Spheres Manifesting Hydrogen Condensation}, 
  volume={881}, 
  DOI={10.3847/1538-4357/ab2987}, 
  publisher={American Astronomical Society}, 
  author={Walker, Mark A. and Wardle, Mark J.}, 
  year={2019}, 
  month={Aug}
  }