KALISZEWSKI, Piotr. Preventive actions of the KRUS Prevention Office during the COVID-19 epidemic. Ubezpieczenia w Rolnictwie – Materiały i Studia, [S. l.], n. 1/73, p. 217–233, 2020. Disponível em: https://ojs.academicon.pl/ur/article/view/10140. Acesso em: 6 wrz. 2025.