Children's responses to mother-infant and father-infant interaction with a baby sibling: jealousy or joy?
Journal of Family Psychology (2014) - Comment
pubmed: 25150371  doi: 10.1037/a0037811  issn: 1939-1293  issn: 0893-3200 

Brenda L. Volling, Tianyi Yu, Richard Gonzalez, Denise E. Kennedy, Lauren Rosenberg, Wonjung Oh