D.197-D.208: 'Isolation and Properties of an Inducible and a Constitutive Β-Lactamase from Pseudomonas aeruginosa', with M. Berks and K. Redhead, Journal of General Microbiology, 1982.

D.209: 'Inhibition of Glucosamine Synthetase by Bacilysin and Anticapsin', by Henryk Chmara, Journal of General Microbiology, ?1984. The paper was revised by Abraham prior to publication.

D.210: 'Stoichiometry of Oxygen Consumption in the Biosynthesis of Isopenicllin N from a Tripeptide', with Robert L. White et al, Biochemical Journal 203, 1982.

D.211: 'Penicillin Biosynthesis: Oxygen Stoichiometry of Isopenicillin N Synthesis in a Cell-free System', with Robert L. White et al, on which is inscribed the same publication reference as for the paper described in D.210. The texts of the articles are different; the authors are the same.

D.212: 'Penicillin Biosynthesis. Dual Pathways from a Modified Substrate', with Robert M. Adlington et al, Journal of Chemical Studies: 'Chemical Communications', 1983.

D.213: 'Conversion of 17O/ 18O Labelled δ-(L-α-Aminoadipyl)-L-cysteinyl-D-valine to 17O/ 18O Labelled Isopenicillin N in a Cell-free Extract of Cephalosporium acremonium', with Robert M. Adlington et al, Tetrahedron 39, 1983.