B.M. Nzimbi, G.P. Pokhariyal and J.M. Khalagai, Linear operators for which T* and T^2 commute, Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear. Global Journal of Pure and Applied Mathematics(GJPAM),2012, to appear. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

Submitted. On Unitary Invariance of Some Classes of Operators in Hilbert Spaces. Pure Mathematical Sciences. 9(1):45-52. AbstractWebsite

2020. On unitary equivalence of some classes of operators in Hilbert spaces. International Journal of Statistics and Applied Mathematics. 5(2):35-37. AbstractWebsite

2020. Separation axioms on function spaces defined on bitopological spaces. Journal of Advanced Studies in Topology. 9(2):113-118. AbstractWebsite

2018. Splitting and Admissible Topologies Defined on the Set of Continuous Functions Between Bitopological Spaces. International Journal of Mathematical Archive (IJMA). 9(1) AbstractWebsite

2018. Remarks on A-skew-adjoint, A-almost similarity equivalence and other operators in Hilbert space. Pure and Applied Mathematics Journal. 6(3):101-107. AbstractWebsite

2017. On A-Self-Adjoint, A-Unitary Operators and Quasiaffinities. SciencePG journals. Vol. 1(3 ):56-60. Abstract

2016. On A-Self-Adjoint, A-Unitary Operators and Quasiaffinities. SciencePG journals. Vol. 1(3 ):56-60. Abstract

2016. B.M. Nzimbi, G.P. Pokhariyal and J.M. Khalagai, A note on Similarity, Almost-Similarity and Equivalence of Operators, Far East Mathematics Journal, Vol 28, Issue 2(February 2008), 305-317.. Far East Mathematics Journal, Vol 28, Issue 2(February 2008), 305-317.. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

2008. On Quasiaffinity and Quasiaffine inverses of partial isometries. Bulletin of the Allahabad Mathematical Society Vol. 15 35-40.. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

2000. On quasiffine inverses of operators; Kenya Journal of Science. Series A 10 (2), 107 - 116.. Bulletin of the Allahabad Mathematical Society Vol. 15 35-40.. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

1996. On intertwining operators Discovery and innovation vol. 16 no 4 p355-357.. Bulletin of the Allahabad Mathematical Society Vol. 15 35-40.. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

1994. On Quasiaffine inverses of Operators. Proceedings of the Third Pan-African Congress of Mathematicians held in Kenya. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

1991. Commutants and conditions on Operators implying normality. Kenya Journal of Science, Series A. vol. 9 p.43-45. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

1988. On the Operator Equation AH = KA, Mathematics today, volume v, p. 29-36.. Kenya Journal of Science, Series A. vol. 9 p.43-45. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

1987. J. M. Khalagai, "On the Operator Equation TST* = S. Unitary Solutions. Kenya J. Science Technology Series A 6(2): 157-163.. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

1985. Further remarks on the Operator Equation AB+BA*=A*B+BA=I. Kenya J. Science Technology Series A 4(l): 31-35. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

1983. .P. Duggal and J. M. Khalagai, Operator Equation AB+BA*=A*B+BA=I, India J.. Pure Applied Maths. Vol.13 (11) , 526-531.. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

1982. On the operator equation AB + BA* = A*B+BA = I, Proceedings of the First African Symposium in Pure and Applied Mathematics and Mathematics Education. Nairobi, Kenya. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

1981. On the Operator Equation AB+BA*=A*B+BA=l. Maths Japon, 26 No.5 577-583. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

1981. On the operator equation AB + BA* = A*B+BA = I, Proceedings of the First African Symposium in Pure and Applied Mathematics and Mathematics Education. Nairobi, Kenya. : Global Journal of Pure and Applied Mathematics(GJPAM), 2012, to appear Abstract

1981.