Tuggener D, Businger M. Needles in Haystacks: Semi-Automatic Identification of Regional Grammatical Variation in Standard German. In: Fuß E, Konopka M, Trawiński B, Waßner UH, Hrsg. Grammar and Corpora 2016. Heidelberg University Publishing; 2018:313-335. doi:10.17885/heiup.361.c4709