Theory and numerics for multi-term periodic delay differential equations: small solutions and their detection. Ford, Neville J.; Lumb, Patricia M. — 2007 ETNA. Electronic Transactions on Numerical Analysis [electronic only]
Asymptotic error expansions for linear multistep methods for a class delay integro-differential equations Christopher T. H. Baker; Neville J. Ford — 1990 Δελτίο της Ελληνικής Μαθηματικής Εταιρίας