@phdthesis{Trifonov,
  author    = {Trifonov, Stefan},
  title     = {Diving Deeper into the Activities and Goals in the Entrepreneurial Process of Internet-enabled Startups},
  series = {an activity-based Perspective in the Context of Accelerator Programs},
  journal   = {an activity-based Perspective in the Context of Accelerator Programs},
  school      = {Universit{\"a}t Potsdam},
  language  = {en}
}
@phdthesis{Huettel,
  author    = {H{\"u}ttel, Alexandra},
  title     = {The role of human values in sustainable consumption},
  school      = {Universit{\"a}t Potsdam},
  language  = {en}
}