Staszewski, W. 2019. The Labor Law Issues in the Treaties of Friendship and Cooperation Made by Poland with the Western European Countries after 1989. Teka Komisji Prawniczej PAN Oddział w Lublinie. 12, 2 (Dec. 2019), 337–350. DOI:https://doi.org/10.32084/tekapr.2019.12.2-26.