References
- Office for promoting Nigerian Enterprises (OPEN) . 1982 . Study of taxi patronage and operating costs in Niamey , Niamey .
- Association for Professional Training in Transport (AFT) . 1982 . Study on the functioning of the passenger transport department in the SNTN
- Ministry of Trade and Transport, Republic of Niger . 1984 . Study on urban public transport in the city of Niamey , BCEOM .
- Piozin , F. 1984 . Urban paratransit in developing countries: hundred bibliographical references , Transport Research Institute (IRT) . NI 34.