Thomas, S Inui; Winstone, M Nyandiko; John, E Sidle; Violet, N Yebei; Richard, M Frankel; David, L Mossbarger; David, Ayuku; Joyce, Ballidawa; Rose, Ayikukwei(Taylor and Francis group, 2012-02-02)
Kimaiyo Sylvester; Sidle John; Nyandiko Winstone M.; Inui Thomas S; Frankel Richard M; Muriuki Tadeo; Mamlin Joseph; Einterz Robert(Springer, 2007-10-31)