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Available at: &lt;<a href="http://web.pwsz.pila.pl/~pes/index.php/proceedings/article/view/474-498" target="_new">http://web.pwsz.pila.pl/~pes/index.php/proceedings/article/view/474-498</a>&gt;. Date accessed: 20 may 2024.
doi: <a href="https://doi.org/10.14595/CP/02/030">https://doi.org/10.14595/CP/02/030</a>.