“The Labour Code Law of 26 June 1974 as ammended in 1975, 1981, 1982, 1985, 1986, 1987, 1988, 1989 and 1990 (excerpts). Part II. Individual Employment Relationship”, CC&EEL, no. 2(86), pp. 77–91, Dec. 1990, Accessed: Oct. 06, 2025. [Online]. Available: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1285