Duncan, D. T., S. D. Regan, D. Shelley, K. Day, R. R. Ruff, M. Al-Bayan, and B. Elbel. “Application of Global Positioning System Methods for the Study of Obesity and Hypertension Risk Among Low-Income Housing Residents in New York City: A Spatial Feasibility Study”. Geospatial Health, Vol. 9, no. 1, Nov. 2014, pp. 57-70, doi:10.4081/gh.2014.6.