Piątek, Jarosław J Piątek, J. J. (2021). Internal security of the Republic of Poland and international migration. European Research Studies Journal, 24(s4), 196-205..
,
2021
Piatek, Jaroslaw J ; Podgorzanska, Renata Piatek, J. J., & Podgorzanska, R. (2021). Counteracting pandemic threats and consequences: the role of the territorial defence forces in crisis management. European Research Studies Journal, 24(2), 621-635..
,
2021