Gärtner, Hans-Martin. "More on the indefinite-interrogative affinity: The view from embedded non-finite interrogatives" Linguistic Typology, 13.1 (2009): 1-37. Retrieved 22 May. 2013, from doi:10.1515/LITY.2009.001

Gärtner, H. (2009). More on the indefinite-interrogative affinity: The view from embedded non-finite interrogatives. Linguistic Typology, 13(1), pp. 1-195. Retrieved 22 May. 2013, from doi:10.1515/LITY.2009.001

Gärtner, Hans-Martin. 2009. More on the indefinite-interrogative affinity: The view from embedded non-finite interrogatives. Linguistic Typology. 13(1): 1-195. Retrieved 22 May. 2013, from doi:10.1515/LITY.2009.001