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 Door Entry Systems and the Commercial Environment.
<strong>Journal of Design &amp; Technology Education</strong>, [S.l.], v. 4, n. 2, july 2009.
ISSN 1360-1431. Available at: &lt;<a href="https://www.ariadne.ac.uk/JDTE/article/view/504" target="_new">https://www.ariadne.ac.uk/JDTE/article/view/504</a>&gt;. Date accessed: 24 sep. 2022.