Klippi, A. and Helasvuo, M.-L. 2011. Changes in Agrammatic Conversational Speech over a 20 Year Period – From Single Word Turns to Grammatical Constructions. Journal of Interactional Research in Communication Disorders. 2, 1 (Jul. 2011), 29–59. DOI:https://doi.org/10.1558/jircd.v2i1.29.