Some properties of the functional equation φ ( x ) = f ( x ) + ∫ O λ x g ( x , y , φ ( y ) ) d y . Chambers, Ll.G. — 1991 International Journal of Mathematics and Mathematical Sciences
Solutions of the neutral differential-difference equation α x ' ( t ) + β x ' ( t - r ) + γ x ( t ) + δ x ( t - r ) = f ( t ) . Chambers, Ll.G. — 1992 International Journal of Mathematics and Mathematical Sciences