Gray, Richard, & Malla, S. (2007). Reducing Trans Fats Consumption in Canada: Voluntary/Mandatory Labeling System or Trans Fats Ban? CAIRNS Policy Briefs, 273066. https://doi.org/10.22004/AG.ECON.273066
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Gray, R., & Malla, S. (2001). The Evaluation of the Economic and External Health Benefits from Canola Research. In J. Alston, P. Pardey, & M. Taylor (Eds.), Agricultural Science Policy: Changing Global Agendas (pp. 211–237). John Hopkins University Press for the International Food Policy Research Institute.
Gray, Richard, & Malla, S. (1998). A Note on Evaluating Agricultural Policy in the Presence of Health Care Cost Externalities: Dairy Production Quotas and Coronary Heart Disease Costs. Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, 46(2), 247–256. https://doi.org/10.1111/j.1744-7976.1998.tb00366.x
Gray, Richard, Malla, S., & Stephen, A. (1998). Canadian Dietary Fat Substitutions, 1955-93, and Coronary Heart Disease Costs. Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, 46(2), 233–246. https://doi.org/10.1111/j.1744-7976.1998.tb00365.x