International Journal of Behavioral Development (2015) - Comment
doi: 10.1177/0165025414542712  issn: 0165-0254  issn: 1464-0651 

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Steinunn Gestsdottir, G. John Geldhof, Tomáš Paus, Alexandra M. Freund, Sigrun Adalbjarnardottir, Jacqueline V. Lerner, Richard M. Lerner