Kortmann, Bernd. 1997. Adverbial Subordination: A Typology and History of Adverbial Subordinators Based on European Languages. Berlin: Mouton de Gruyter.
@book{Kortmann-1997, address = {Berlin}, author = {Kortmann, Bernd}, publisher = {Mouton de Gruyter}, title = {Adverbial Subordination: A Typology and History of Adverbial Subordinators Based on European Languages}, year = {1997} }