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Lewis, S.N. and West, A.F. and Stein, A. and Malmberg, L.E. and Bethell, K. and Barnes, Jacqueline and Sylva, K. and Leach, Penelope (2009) A comparison of father-infant interaction between primary and non-primary care giving fathers. Child: Care, Health and Development 35 (2), pp. 199-207. ISSN 0305-1862.

Malmberg, L.E. and Stein, A. and West, A.F. and Lewis, S.N. and Barnes, Jacqueline and Leach, Penelope and Sylva, K. (2007) Parent-infant interaction: a growth model approach. Infant Behavior and Development 30 (4), 615 - 630. ISSN 0163-6383.