Ifelebuegu, Augustine O.; Ukpebor, Justina E.; Ahukannah, Anita U.; Nnadi, Ernest O.; Theophilus, Stephen C. (April 2017). "Environmental effects of crude oil spill on the physicochemical and hydrobiological characteristics of the Nun River, Niger Delta". Environmental Monitoring and Assessment. 189 (4): 173. Bibcode:2017EMnAs.189..173I. doi:10.1007/s10661-017-5882-x. ISSN1573-2959. PMID28321680.
Ifelebuegu, Augustine O.; Ukpebor, Justina E.; Ahukannah, Anita U.; Nnadi, Ernest O.; Theophilus, Stephen C. (April 2017). "Environmental effects of crude oil spill on the physicochemical and hydrobiological characteristics of the Nun River, Niger Delta". Environmental Monitoring and Assessment. 189 (4): 173. Bibcode:2017EMnAs.189..173I. doi:10.1007/s10661-017-5882-x. ISSN1573-2959. PMID28321680.
Ifelebuegu, Augustine O.; Ukpebor, Justina E.; Ahukannah, Anita U.; Nnadi, Ernest O.; Theophilus, Stephen C. (April 2017). "Environmental effects of crude oil spill on the physicochemical and hydrobiological characteristics of the Nun River, Niger Delta". Environmental Monitoring and Assessment. 189 (4): 173. Bibcode:2017EMnAs.189..173I. doi:10.1007/s10661-017-5882-x. ISSN1573-2959. PMID28321680.
Ifelebuegu, Augustine O.; Ukpebor, Justina E.; Ahukannah, Anita U.; Nnadi, Ernest O.; Theophilus, Stephen C. (April 2017). "Environmental effects of crude oil spill on the physicochemical and hydrobiological characteristics of the Nun River, Niger Delta". Environmental Monitoring and Assessment. 189 (4): 173. Bibcode:2017EMnAs.189..173I. doi:10.1007/s10661-017-5882-x. ISSN1573-2959. PMID28321680.