1. Rokach A. The psychological journey to and from loneliness: Development, causes, and effects of social and emotional isolation. Academic Press; 2019.
2. Beutel ME, Klein EM, Brähler E, et al. Loneliness in the general population: prevalence, determinants and relations to mental health. BMC Psychiatry. 2017; 17(1). doi: 10.1186/s12888-017-1262-x
3. Heinze JE. Belonging and social transitions: The role of belonging needs during a period of social transition. University of Illinois Chicago; 2013.
4. Bowlby J. Attachment and loss, vol. 1, attachment, 2nd ed. Basic books; 1969.
5. Betts LR, Bicknell ASA. Experiencing loneliness in childhood: Consequences for psychological adjustment, school adjustment, and academic performance. In: Bevinn SJ (editor). Psychology of loneliness. Nova Science Pub; 2011.