Source: https://www.researchgate.net/profile/Chokri-Mamoghli/publication/236132451_Finance_Des_Marches_Exercices_et_Cas_de_Synthese_corriges/links/00b7d5164160d0e087000000/Finance-Des-Marches-Exercices-et-Cas-de-Synthese-corriges.pdf