Articles by Marek Gruszczyński
 
SHORT NOTE

Editorial

GNPJE 2020;301(1):5–8
 
SHORT NOTE

Editorial

GNPJE 2019;297(1):5–7
 
RESEARCH PAPER

Editorial

GNPJE 2018;293(1):5–8
 
eISSN:2300-5238
ISSN:0867-0005