Educating attention: recruiting, maintaining, and framing eye contact in early natural mother-infant interactions
I. Nomikou, K. Rohlfing, J. Szufnarowska, Interaction Studies 14 (2013) 240–267.

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.