https://community.crossref.org/t/what-is-the-24-hour-rule-for-klm-klm-helpdesk-24×7-help/8034

https://community.crossref.org/t/what-is-the-24-hour-rule-for-klm-klm-helpdesk-24×7-help/8034https://community.crossref.org/t/what-is-the-24-hour-rule-for-klm-klm-helpdesk-24×7-help/8034https://community.crossref.org/t/what-is-the-24-hour-rule-for-klm-klm-helpdesk-24×7-help/8034https://community.crossref.org/t/what-is-the-24-hour-rule-for-klm-klm-helpdesk-24×7-help/8034