CZYŻYCKI, Rafał.
 Non-model methods in the study of regional development – the impact of the aggregation formula on the obtained research results.
<strong>&lt;center&gt;Conference Proceedings &lt;BR&gt; Determinants Of Regional Development&lt;/center&gt;</strong>, [S.l.], n. 1, jan. 2019.
Available at: &lt;<a href="https://pes.ans.pila.pl/index.php/proceedings/article/view/165" target="_new">https://pes.ans.pila.pl/index.php/proceedings/article/view/165</a>&gt;. Date accessed: 25 may 2026.
doi: <a href="https://doi.org/10.14595/CP/01/014">https://doi.org/10.14595/CP/01/014</a>.