Kortmann 1997

Kortmann, Bernd. 1997. Adverbial subordination: A typology and history of adverbial subordinators based on European languages. Berlin: Mouton de Gruyter.

https://www.degruyter.com/document/doi/10.1515/9783110812428/html

@book{kortmann_adverbial_1997,
  address    = {Berlin},
  author     = {Kortmann, Bernd},
  publisher  = {Mouton de Gruyter},
  title      = {Adverbial subordination: A typology and history of adverbial subordinators based on European languages},
  url        = {https://www.degruyter.com/document/doi/10.1515/9783110812428/html},
  year       = {1997},
  isbn       = {978-3-11-015114-5},
  shorttitle = {Adverbial Subordination}
}