Walid Hejazi and Daniel Trefler, " Canada and the Asia Pacific Region: Views from the Gravity, Monopolistic Competition, and Heckscher-Ohlin Models," in Richard G. Harris, The Asia Pacific Region in the Global Economy: A Canadian Perspective, The Industry Canada Research Series, University of Calgary Press, 1996, p.72.
Walid Hejazi et Daniel Trefler, « Canada and The Asia Pacific Region : Use from the Gravity, Monopolistic Competition, and Heckscher-Ohlin Models », dans Richard G. Harris, The Asia Pacific Region in the Global Economy : A Canadian Perspective, The Industry Canada Research Series, University of Calgary Press, 1996, page 72.