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\bibitem{Akbulut_etal2013} {\textquotedblleft}\textit{Gross alpha and beta activities of airborne particulate samples from Wawel Royal Castle Museum in Cracow, Poland}{\textquotedblright}. Akbulut S, Krupinska B, Worobiec A, {\v C}evik U, Taskin H, Van Grieken R, Samek L, Wi{\l}koj{\'c} E, Journal of radioanalytical and nuclear chemistry \textbf{295}, 1567 (2013).   http://doi.org/10.1007/S10967-012-1983-8

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