@InCollection{	  HehlMohammadiNeitzelWollner:2019,
  author	= {Hehl, A. and Mohammadi, M. and Neitzel, I. and Wollner, W.},
  title		= {Optimizing Fracture Propagation Using a Phase-Field Approach},
  booktitle	= {to appear},
  year		= {2020},
  annote	= {series,}
}