@article{HuberZimmermannRentropetal.2016,
  author    = {Melanie Huber and Stephan Zimmermann and Christopher Rentrop and Carsten Felden},
  title     = {The Relation of Shadow Systems and ERP Systems},
  journal   = {Systems : open access journal},
  series    = {Insights from a Multiple-Case Study},
  volume    = {4},
  number    = {1},
  doi       = {10.3390/systems4010011},
  year        = {2016},
}