LAITINEN, Markku Antero.
 Fix, Develop, Keep!.
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ISSN 2241-1925.
Available at: &lt;<a href="http://www.qqml.net/index.php/qqml/article/view/577" target="_new">http://www.qqml.net/index.php/qqml/article/view/577</a>&gt;. Date accessed: 05 may 2024.