John O. Okpara
发表
John O. Okpara,
J. Okpara,
2004,
Inf. Technol. People.
John O. Okpara,
J. Okpara,
Michael Squillace,
2005
.
John O. Okpara,
J. Okpara,
Pamela Wynn,
2007
.
John O. Okpara,
J. Okpara,
Jean D. Kabongo,
2014
.
Daphne Halkias,
John O. Okpara,
J. Okpara,
2011
.
John O. Okpara,
J. Okpara,
2007
.
John O. Okpara,
J. Okpara,
2009
.
Samuel O. Idowu,
John O. Okpara,
J. Okpara,
2013
.