(en) Philip A. Sellers, Sherman Fried, Robert E. Elson et W. H. Zachariasen, « The Preparation of Some Protactinium Compounds and the Metal », Journal of the American Chemical Society, vol. 76, , p. 5935 (DOI10.1021/ja01652a011).
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(en) Boris F. Myasoedov, H. W. Kirby, & Ivan G. Tananaev (2006) Protactinium, Chapter 4 in Morss, Lester R. & Edelstein, Norman M. & Fuger, Jean, (edit.) The Chemistry of the Actinide and Transactinide Elements (PDF). Dordrecht: Springer. ss. 161–252.
