ŚMIGLA, Marta.
 The diversity of milk production in the regions of the European Union in the year 2007-2011.
<strong>Progress in Economic Sciences</strong>, [S.l.], n. 1, aug. 2014.
ISSN 2391-5951.
Available at: &lt;<a href="http://www.pes.pwsz.pila.pl/index.php/PES/article/view/13" target="_new">http://www.pes.pwsz.pila.pl/index.php/PES/article/view/13</a>&gt;. Date accessed: 19 aug. 2025.
doi: <a href="https://doi.org/10.14595/PIES/01/007">https://doi.org/10.14595/PIES/01/007</a>.