Boye, K., Poulsen, M., Pedersen, H. B., Christensen, M. H., Dalberg, L., & Vinther, N. M. (2012). Presence vs. absence of the Danish complementizer at in spoken and written language. NyS, Nydanske Sprogstudier, 42(42), 193. https://doi.org/10.7146/nys.v42i42.13818