Alunos que irão utilizar trade offs como estratégia, olhar este material:
Porter, M. (1985). Competitive advantage: Creating and sustaining superior performance. New York: Free Press; Porter, M. (1989). Competitive advantage of nations. New York: Free Press. Porter, M. (1980). Competitive strategy: Techniques for analyzing industries and companies. New York: Free Press, 1980; Porter, M. (2001, March). Strategy and the Internet. Harvard Business Review, pp. 63–78; Retrospective on Michael Porter’s Competitive strategy. (2002). Academy of Management Executive 16(2), 40–65.