E. Wlodarczyk, A. Rybak (2017). ANALYSIS OF THE SOCIOLOGICAL ASPECT OF USING EMPLOYEE OUTSOURCING IN COAL COMPANIES IN POLAND.. 4th International Multidisciplinary Scientific Conference on Social Sciences and Arts SGEM 2017, 91-98. https://doi.org/10.5593/sgemsocial2017/15/S05.012