Geddie, Morgan W.. Age diversity in hospitality - making a case for the mature employee / Morgan W. Geddie, Faye Hall Jackson. - 2002. // Journal of human resources in hospitality and tourism. Vol. 1 (2002), No. 2
Selection of outbound package tours: the case of senior citizens in Hong Kong / Louisa Yee-Sum Lee ... [et al.]. - 2012. // Journal of China tourism research. Vol. 8 (2012), No. 1-2-3-4
Breen, Helen. Senior citizen bingo players in Australian registered and licenced clubs: a case study at Tweed Heads, New South Wales / Helen Breen. - 2009. // Journal of travel & tourism marketing OTPIS 2021. Vol. 26 (2009), No. 4