INDEXING :

Library of Congress (USA)

EBSCO (USA) 

ProQuest (USA)

Dimensions (UK)

Scilit (Switzerland)

Zeitschriftenbibliothek (Germany)

WorldCat (USA/France/OCLC N° 1151913042)

Index Copernicus (Poland)

ICMJE (USA)

Google Scholar (USA)

CrossRef (USA)

ARCHIVING :

PKP PN