Bieluk, J. 2021. Pledge on shares in companies that are owners or perpetual usufructuaries of agricultural real estate – a paradox of Clause 3a of Article 3a of the Act on shaping the agricultural system. Przegląd Prawa Rolnego. 1(28) (Jun. 2021), 59–68. DOI:https://doi.org/10.14746/ppr.2021.28.1.3.