Children's lexical skills and task demands affect gestural behavior in mothers of late-talking children and children with typical language development [Reprint]
A. Grimminger, K. Rohlfing, P. Stenneken, in: J.-M. Colletta, M. Guidetti (Eds.), Gesture and Multimodal Development, John Benjamins Publishing Company, 2012, pp. 129–155.

Children's lexical skills and task demands affect gestural behavior in mothers of late-talking children and children with typical language development
A. Grimminger, K. Rohlfing, P. Stenneken, Gesture 10 (2010) 251–278.