FRANEK, Sławomir.
 Multiannual expenditures in state budget and local government budgets in Poland.
<strong>Optimum. Economic Studies</strong>, [S.l.], n. 4 (102), p. 58-68, gru. 2020.
ISSN 1506-7637.
Dostępne w: &lt;<a href="http://optimum.uwb.edu.pl/index.php/osj/article/view/409" target="_new">http://optimum.uwb.edu.pl/index.php/osj/article/view/409</a>&gt;. Data dostępu: 16 sty. 2021.
doi: <a href="https://doi.org/10.15290/oes.2020.04.102.05">https://doi.org/10.15290/oes.2020.04.102.05</a>.