@article{Kranich2013,
  author    = {Svenja Kranich},
  title     = {Functional layering and the English progressive},
  journal   = {Linguistics : an interdisciplinary journal of the language sciences},
  volume    = {51},
  number    = {1},
  pages     = {1 -- 32},
  doi       = {10.1515/ling-2013-0001},
  year      = {2013},
}