1. Abell DF. Defining the business: the starting point of strategic planning. Prentice-Hall Inc: Englewood Cliffs; 1980.
2. Al-Debei MM, Avison D. Developing a unified framework of the business model concept. Eur J Inf Syst. 2010;19(3):359–76.
3. Allaire Y, Firsirotu M. L’entreprise stratégique: penser la stratégie. Boucherville: Gaëtan Morin; 1993.
4. Allaire Y, Firsirotu M. Stratégie et Moteurs de Performance. Montréal/Québec: Chenelière McGraw-Hill; 2004.
5. Allal-Chérif O, Favier M. Creating value through business model innovation. Sloan Manag Rev. 2012;53(3):40–50.