I. Youssouf, M. L. Youssouf, D. Soumarkamla, and M. Ayao, “Traditional Poultry Supply and Marketing in the City of N’Djamena in Chad”, Int. J. Poult. Sci., vol. 11, no. 5, pp. 341–348, Apr. 2012, doi: 10.3923/ijps.2012.341.348.