A. M. Świątkowski, “Some legal consequences of transforming an employment relationship into a fictitious – not an employee – legal relationship: abstraction or effective practice?”, in The use of atypical forms of employment in violation of labour and social security laws - diagnosis and prospects for the future, T. Duraj, Ed. Poland: Lodz University Press, 2023, pp. 297–310. doi: 10.18778/8331-395-5.24.