Nanfosso, Roger Tsafack, et al. “Volume Time and Labor Income: An Analysis of Labour of the Motor Bike Transporters in Cameroon”. La Revue Internationale Des Économistes De Langue Française, vol. 9, no. 2, Dec. 2024, pp. 196-18, https://doi.org/10.18559/rielf.2024.2.2021.