Geographical Disadvantage: A Heckscher-Ohlin-von Thunen Model of International Specialization
Anthony Venables, Nuno Limão
Journal of International Economics, vol. 58, 2002, p. 239-263.

Infrastructure, Geographical Disadvantage, Transport Costs, and Trade
Nuno Limão, Anthony Venables
World Bank Economic Review, vol. 15, 2001, p. 451-479.