Barker, Gary; Gabriela Aguiar, Marcos Nascimento and Marcio Segundo (2007), "Early Childhood in Brazil: General Overview and Current Issues (with Gabriela Aguiar, Marcos Nascimento and Marcio Segundo)", Bernard Van Leer Foundation. Working Papers in Early Childhood Development, 44

Barker, Gary (2005), "Young Men and the Construction of Masculinity in sub-Saharan Africa: Implications for HIV/AIDS, Conflict and Violence", Social Development Papers, Conflict Prevention and Reconstruction, World Bank, Paper No. 26, June,

Barker, Gary; Fontes, Miguel (1996), "Review and Analysis of International Experience with Programs Targeted on At-Risk Youth ", World Bank Working Paper

Barker, Gary (1991), "Reaching the Hard-to-Reach: Health Strategies for Serving Urban Young Women", CHILDHOPE-USA Working Paper, Working Paper 2

Barker, Gary (1991), "Reaching the Hard-to-Reach: Health Strategies for Serving Urban Young Women ", CHILDHOPE-USA Working Papers, 2