Look at them...

1.    Convocation Lecture - Delivered at the Claretian Institute of Philosophy, Nekede, Owerri, NIGERIA (An affiliate of the University of Port Harcourt, NIGERIA)

2.    PhD Thesis    -    Written and submitted to the Department of Mathematics, University of Benin, Benin City, Nigeria as part of the requirement for admission into the Degree of Doctor of Philosophy (PhD) in Mathematics of the University of Benin.