https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5322431

https://novelight.net/character/1o-ways-to-contact-how-to-speak-to-someone-at-united-airlines-through-contact-options-a-step-by-step-guide

https://thetolkien.forum/threads/six-ways-talk-to-a-real-person-at-deltas-airlines-process-guide-step.35025/

https://novelight.net/character/how-to-call-to-a-live-agent-at-jetblue-airlines-skip-long-wait-for-travel

https://forum.aerosoft.com/index.php?/topic/181081-6-ways-how-to-talk-to-customer-help-at-virgin-atlantic-the-ultimate-how-to-guide/

https://thetolkien.forum/threads/best-ways-to-call-to-a-human-at-allegiant-airlines-customer-service.35029/

https://thetolkien.forum/threads/6-smart-ways-to-reach-delta-airlines-customer-support.35036/

https://support.google.com/analytics/thread/353142432/fast-fix-for-%E2%84%82oinbase-pending-withdrawal%E2%80%94here%E2%80%99s-what-works

https://thetolkien.forum/threads/seven-ways-to-connect-to-live-agent-at-royal-caribbean-via-phone-email-or-chat-options-a-complete-guide.35034/

https://sortitoutsi.net/content/73477/ways-to-speak-to-a-live-person-at-quickbooks-payroll-support-fast-easy