MILEWSKI, Dariusz and MILEWSKA, Beata. Effective concepts of management against the challenges of the modern world: Lean and Agile: competition or cooperation?. Ekonomia i Prawo. Economics and Law. Online. 31 March 2024. Vol. 23, no. 1, pp. 137-161. [Accessed 8 July 2025]. DOI 10.12775/EiP.2024.007.