@article{UBHD-68096437,
  author={Frank, Uri and Leitz, Thomas and M{\"u}ller, Werner A.},
  title={The hydroid Hydractinia},
  subtitle={a versatile, informative cnidarian representative},
  year={2001},
  pages={963-971},
  language={eng},
  issn={1521-1878},
  volume={23},
  number={10},
  journal={Bioessays},
  doi={10.1002/bies.1137},
}
@article{UBHD-68095152,
  author={M{\"u}ller, Werner A. and Leitz, Thomas},
  title={Metamorphosis in the Cnidaria},
  year={2002},
  pages={1755-1771},
  language={eng},
  issn={1480-3283},
  volume={80},
  number={10},
  journal={Canadian journal of zoology},
  doi={10.1139/Z02-130},
}