{{Cite journal| doi = 10.1093/heapol/czy077| issn = 0268-1080, 1460-2237| volume = septembre 2018| last1 = Nguyen| first1 = Hoa Thi| last2 = Zombré| first2 = David| last3 = Ridde| first3 = Valery| last4 = De Allegri| first4 = Manuela| title = The impact of reducing and eliminating user fees on facility-based delivery: a controlled interrupted time series in Burkina Faso| journal = Health Policy and Planning| access-date = 2018-09-28| date = 2018-09-26| url = https://academic.oup.com/heapol/advance-article/doi/10.1093/heapol/czy077/5107204}}