Wanjau, Ndung’u Charles; Kiragu, David Ndung'u; Riro, George Kamau(International Journal of Academic Research in Accounting, Finance and Management Sciences, 2019-01)
Wathigo, J.M; Keraita, James Nyambega; Byiringiro, Jean Bosco; Muguthu, Joseph(IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE), 2017-07-20)