Bibliothèque nationale de Finlande - https://fennica.linneanet.fi (2014-05-14)
BnF Service finno-ougrien, balte 2014-08-13
Collective emotions : perspectives from psychology, philosophy, and sociology / edited
by Christian von Scheve and Mikko Salmela, 2014
HCAS - http://www.helsinki.fi/collegium/english/people/salmela/index.htm (2014-08-13)
LC Authorities - http://authorities.loc.gov (2014-05-12)