@incollection{EngelsJendernalikOsthues2013,
  author    = {Engels, Christoph and Jendernalik, Lars and Osthues, Marc},
  title     = {"Smart planning"},
  series = {CIRED 22nd international conference on electricity distribution, Stockholm 10-13 June 2013},
  publisher = {CIRED},
  address   = {Li{\`e}ge},
  year      = {2013},
  language  = {en}
}
@incollection{EngelsJendernalikKienle2012,
  author    = {Engels, Christoph and Jendernalik, Lars and Kienle, Andrea},
  title     = {Smart planning},
  series = {Smart Energy 2012 : Wie smart ist der Weg zur Energiewende?},
  publisher = {H{\"u}lsbusch},
  address   = {Gl{\"u}ckstadt},
  pages     = {13},
  year      = {2012},
  language  = {de}
}
@incollection{EngelsJendernalikOsthues2012,
  author    = {Engels, Christoph and Jendernalik, Lars and Osthues, Marc},
  title     = {Integrated optimization of distribution system planning and transition into new grid structures},
  series = {Workshop on integration of renewables into the distribution grid 2012 (CIRED 2012) : Lisbon, Portugal, 29-30 May 2012},
  publisher = {Curran},
  address   = {Red Hook, NY},
  pages     = {4},
  year      = {2012},
  language  = {en}
}