Ottersen, T., Grépin, K. A., Henderson, K., Pinkstaff, C. B., Norheim, O. F., & Røttingen, J. (2018). New approaches to ranking countries for the allocation of development assistance for health: Choices, indicators and implications. Health Policy Plan.

Ottersen, Trygve, Karen A. Grépin, Klara Henderson, Crossley Beth Pinkstaff, Ole Frithjof Norheim, e John-Arne Røttingen. "New Approaches to Ranking Countries for the Allocation of Development Assistance for Health: Choices, Indicators and Implications." Health Policy Plan 2018.

Ottersen, Trygve, et al. "New Approaches to Ranking Countries for the Allocation of Development Assistance for Health: Choices, Indicators and Implications." Health Policy Plan 2018.