Czekaj, J. The Methods of Job Security System As an Instrument for Employment Rationalization in the Management Subsystem on the Example of a Public Utility Company. In Metody i techniki zarządzania. Inspiracje dla teorii i praktyki; Kołodziejczak, M., Bednarska-Wnuk, I., Świątek-Barylska, I., Eds.; , Series Ed.; Management; Lodz University Press: Poland, 2020; pp. 51-69. https://doi.org/10.18778/8220-435-3.03.