URL: pgp-journal.kie ... http://pgp-journal.kiev.ua/
Wikidata: www.wikidata.or ... http://www.wikidata.org/entity/Q96699004
FATCAT: fatcat.wiki/con ... https://fatcat.wiki/container/qaoqt53glfgifmnqmrc3qrkbwm
URL: pgp-journal.kie ... http://pgp-journal.kiev.ua/
Wikidata: www.wikidata.or ... http://www.wikidata.org/entity/Q96699004
FATCAT: fatcat.wiki/con ... https://fatcat.wiki/container/qaoqt53glfgifmnqmrc3qrkbwm
Google: www.google.com/ ... https://www.google.com/search?q=ISSN+%222663-5321%22
Bing: www.bing.com/se ... https://www.bing.com/search?q=ISSN+%222663-5321%22
Yahoo: search.yahoo.co ... https://search.yahoo.com/search?p=ISSN%20%222663-5321%22
CROSSREF: search.crossref ... https://search.crossref.org/?q=+2663-5321