Kiełbowicz-Dziwulska A. Control of labour for one’s own employer within the meaning of Article 8 item 2a of the Social Insurance System Act. In: Duraj T, editor. The use of atypical forms of employment in violation of labour and social security laws - diagnosis and prospects for the future [Internet]. Poland: Lodz University Press; 2023 [cited 2026 Jan. 25]. pp. 281-96. (, editor. Law). Available from: https://www.press.uni.lodz.pl/index.php/wul/catalog/book/785/chapter/1882