Barker, Gary; Gabriela Aguiar, Marcos Nascimento and Marcio Segundo (2007), "Early Childhood in Brazil: General Overview and Current Issues ", 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