| Diurnal and seasonal variation of surface refractivity over Nigeria BG Ayantunji, PN Okeke, JO Urama Progress in Electromagnetics Research B 30, 201-222, 2011 | 84 | 2011 |
| Variations of solar coronal hole area and terrestrial lower tropospheric air temperature from 1979 to mid-1998: astronomical forcings of change in earth's climate? W Soon, S Baliunas, ES Posmentier, P Okeke New Astronomy 4 (8), 563-579, 2000 | 80 | 2000 |
| Performance of Phaseolus vulgaris L. in a soil contaminated with spent-engine oil CO Nwoko, PN Okeke, OO Agwu, IE Akpan African Journal of Biotechnology 6 (16), 2007 | 75 | 2007 |
| Senior secondary physics PN Okeke, MW Anyakoha Macmillan, 1987 | 50 | 1987 |
| Inter-annual variability and long-term trend of UV-absorbing aerosols during Harmattan season in sub-Saharan West Africa AC Anuforom, LE Akeh, PN Okeke, FE Opara Atmospheric Environment 41 (7), 1550-1559, 2007 | 46 | 2007 |
| Vela-size glitch rates in youthful pulsars JO Urama, PN Okeke Monthly Notices of the Royal Astronomical Society 310 (2), 313-316, 1999 | 42 | 1999 |
| A comparison of IRI‐TEC predictions with GPS‐TEC measurements over Nsukka, Nigeria D Okoh, A Eze, O Adedoja, B Okere, PN Okeke Space Weather 10 (10), 2012 | 38 | 2012 |
| Water quality study of Ontamiri river in Owerri, Nigeria. PN Okeke, EN Adinna | 33 | 2013 |
| Radiowave propagation measurements in Nigeria (preliminary reports) SE Falodun, PN Okeke Theoretical and applied climatology 113, 127-135, 2013 | 31 | 2013 |
| Finding a relationship between mobility factors of selected heavy metals and soil particle size in soils from children’s playgrounds EN Verla, AW Verla, AF Osisi, PN Okeke, CE Enyoh Environmental monitoring and assessment 191, 1-11, 2019 | 28 | 2019 |
| Using GPS-TEC data to calibrate VTEC computed with the IRI model over Nigeria D Okoh, LA McKinnell, P Cilliers, P Okeke Advances in Space Research 52 (10), 1791-1797, 2013 | 25 | 2013 |
| Periodicities in rotation and DM of PSR B1557–50 AE Chukwude, AA Ubachukwu, PN Okeke Astronomy & Astrophysics 399 (1), 231-235, 2003 | 21 | 2003 |
| Treatment of oil drill cuttings using thermal desorption technique PN Okeke, C Obi ARPN Journal of Systems and Software 3 (7), 153-158, 2013 | 18 | 2013 |
| Evaluation of ambient noise levels in Port Harcourt metropolis, south-south, Nigeria PN Okeke, DMC George IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR …, 2015 | 16 | 2015 |
| A semi-empirical model for vertical extrapolation of surface refractivity over Nigeria BG Ayantunji, PN Okeke, JO Urama, Y Najib The African Review of Physics 6, 2011 | 16 | 2011 |
| EUVE J1429-38.0: an eclipsing polar RS Stobie, PN Okeke, DAH Buckley, D O'Donoghue Monthly Notices of the Royal Astronomical Society 283 (4), L127-L132, 1996 | 16 | 1996 |
| Seasonal variation of surface refractivity over Nigeria BG Ayantunji, PN Okeke, JO Urama Advances in space Research 48 (12), 2023-2027, 2011 | 15 | 2011 |
| Effects of gas flaring on selected arable soil quality indicators in the Niger Delta, Nigeria PN Okeke, CQ Okpala Sky Journal of Soil Science and Environmental Management 3 (1), 001-005, 2014 | 14 | 2014 |
| Radio emission from large-scale radio jets MW Anyakoha, PN Okeke, SE Okoye Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 329, June 1, 1988, p …, 1988 | 13 | 1988 |
| Chemometric assessment of Orashi River after confluence with Oguta Lake EC Ebere, VA Wirnkor, VE Ngozi, PN Okeke, SS Pingale IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) 4 (3), 91-103, 2019 | 12 | 2019 |