{{Cite journal| last1 = Ridde| first1 = Valery| last2 = Coulibaly| first2 = Abdourahmane| last3 = Gautier| first3 = Lara| title = Case studies| journal = LIEPP Methods Brief / Fiches méthodologiques du LIEPP| access-date = 2023-05-30| date = 2023-05-12| url = https://hal.science/hal-04102953}}