palladium
1978 / The Wollaston/Chenevix controversy over the elemental nature of palladium: A curious episode in the history of chemistry / Melvyn C. Usselman / Annals of Science 35 (1978) p. 551 [doi]
1979 / The ‘Synthetic’ Palladium of Richard Chenevix: A Verdict on the Chemist and the Chemistry / Philip A. W. ; Melvyn C. Usselman / Ambix 26 (1979) p. 100 [doi]
1981 / The Artifact as Historical Document Part 2: The Palladium and Rhodium of W. H. Wollaston / B. I. Kronberg ; L. L. Coatsworth ; M. C. Usselman / Ambix 28 (1981) p. 20 [doi]