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\bibitem{Marikutsa_etal2018} {\textquotedblleft}\textit{Sensitivity of nanocrystalline tungsten oxide to CO and ammonia gas determined by surface catalysts}{\textquotedblright}. Marikutsa A, Yang L, Rumyantseva M, Batuk M, Hadermann J, Gaskov A, Sensors and actuators : B : chemical \textbf{277}, 336 (2018).   http://doi.org/10.1016/J.SNB.2018.09.004

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