@book{5129,
	author = {Porter, Michael E.},
	title = {What Is Strategy? },
	publisher = {Harvard Business Review},
	year = {1996},
	url = {https://bibliotheque.tbs-education.fr/Default/doc/edsgao/_b64_ZWRzZ2NsLjE4ODk2OTY0/what-is-strategy}
}