Eric S.E.S.HintzEric S.E.S., Portable Power: Inventor Samuel Ruben and the Birth of Duracell, „Technology and Culture”, 50 (1), 2009, s. 24–57, ISSN0040-165X, JSTOR: 40061566 [dostęp 2022-02-25].
Eric S.E.S.HintzEric S.E.S., Portable Power: Inventor Samuel Ruben and the Birth of Duracell, „Technology and Culture”, 50 (1), 2009, s. 24–57, ISSN0040-165X, JSTOR: 40061566 [dostęp 2022-02-25].