J. W. Kimnju, S. W. Waudo, A. W. Mwang'ombe, R. A. Sikora, and R. P. Schuster, “Distribution of lesion nematodes associated with maize in Kenya and susceptibility of maize cultivars to <i>Pratylenchus</i> zeae”, Afr. Crop Sci. J., vol. 6, no. 4, Apr. 1998.