Søndergaard, T. F.; Andersen, J.; Hjørland, B. (2003). "Documents and the communication of scientific and scholarly information: Revising and updating the UNISIST model". Journal of Documentation. 59 (3): 278. doi:10.1108/00220410310472509. S2CID14697793.
semanticscholar.org
api.semanticscholar.org
Søndergaard, T. F.; Andersen, J.; Hjørland, B. (2003). "Documents and the communication of scientific and scholarly information: Revising and updating the UNISIST model". Journal of Documentation. 59 (3): 278. doi:10.1108/00220410310472509. S2CID14697793.
unesco.org
unesdoc.unesco.org
UNISIST Study Report on the feasibility of a World Science Information System, by the United Nations Educational, Scientific and Cultural Organization and the International Council of Scientific Unions. Unesco Paris 1971. Online: http://unesdoc.unesco.org/images/0006/000648/064862eo.pdf