https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5317230
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5317234
https://www.cybo.com/US-biz/six-ways-to-contact-how-do-i-talk-to
https://hopzone.eu/forums/topic/276358-seven%C2%AE-ways-to-contact-how-do-i-talk-to-someone-at-delta%C2%AE-a-full/
https://zenodo.org/records/15726298
https://doi.org/10.5281/zenodo.15726298
https://hopzone.eu/forums/topic/276409-18-ways-to-call-delta-airlines-customer-service-guide-usaota/
https://pa-hrsuite-production.s3.amazonaws.com/606/docs/1566658.pdf
https://hopzone.eu/forums/topic/276477-fast-way-to-connect-delta-airlines-customer-service-by-phone-call/
https://hopzone.eu/forums/topic/276483-15-way-to-connect-delta-airlines-customer-service-by-phonedelta/
https://hopzone.eu/forums/topic/276494-delta-customer-service-how-to-get-help-247/
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5317394
https://www.getlisteduae.com/listings/14-ways-to-contact-how-can-i-talk-to-someone-at-travelocity-a-step-by-step-guide
https://www.angloinfo.com/riviera/discussions/general/13-ways-to-contact-how-can-i-talk-to-someone-at-travelocit-a-step-by-step-guide
https://www.angloinfo.com/riviera/discussions/general/17-ways-to-call-how-can-i-speak-to-someone-at-travelocity-phone-number-a-step-by-step-guide
https://www.angloinfo.com/riviera/discussions/general/13-ways-to-contact-how-can-i-talk-to-someone-at-travelocity-a-step-by-step-support
https://www.angloinfo.com/riviera/discussions/general/13-ways-to-contact-travelocity-customer-service-phone-number-support-guide-24-7
https://www.angloinfo.com/riviera/discussions/general/one-ways-to-contact-how-can-i-speak-to-someone-at-travelocity-a-comprehensive-guide
https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5317523