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\bibitem{MarkkuT.Haekkinen+HelenT.Sullivan2007} Markku T. H{\"a}kkinen, \& Helen T. Sullivan. (2007). Effective communication of warnings and critical information: Application of accessible design methods to auditory warnings. In K. Nieuwenhuis P. B. B. Van de Walle (Ed.), \textit{Intelligent Human Computer Systems for Crisis Response and Management, ISCRAM 2007 Academic Proceedings Papers} (pp. 167--171). Delft: Information Systems for Crisis Response and Management, ISCRAM.

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