Active control of narrowband acoustic noise of unknown frequency using a phase-locked loop. - Robert J. Schilling; Ahmad F. Al-Ajlouni; James J. Carroll; S. L. Harris (Int. J. Syst. Sci., 1998)

Identification of nonlinear discrete-time systems using raised-cosine radial basis function networks. - Ahmad F. Al-Ajlouni; Robert J. Schilling; S. L. Harris (Int. J. Syst. Sci., 2004)