1. INGWE, Richard. Urbanisation, urban environmental quality, national socio-economic conditions and diseases burden in Africa : a research agenda for spatio-temporal analyses of subregional characteristics. Revija za geografijo. [Tiskana izd.]. 2013, 8, [št.] 2, str. 19-34, ilustr. ISSN 1854-665X. Digitalna knjižnica Slovenije - dLib.si, Digitalna knjižnica Univerze v Mariboru – DKUM. [COBISS.SI-ID 275726080]

2. INGWE, Richard. Between cucltural and natural heritage : pluralism in planning tourism products for rescuing "the lost (Ogoja) province", north-central Cross River State, Nigeria. Revija za geografijo. [Tiskana izd.]. 2014, 9, [št.] 2, str. 7-25, ilustr. ISSN 1854-665X. Digitalna knjižnica Univerze v Mariboru – DKUM, Digitalna knjižnica Slovenije - dLib.si. [COBISS.SI-ID 279581952]