HJØRLAND, Birger. Facet analysis: the logical approach to knowledge organization. In: Information processing and management. March 2013, 49(2), 545-557. doi:10.1016/j.ipm.2012.10.001. ISSN 0306-4573.
Dostupný komerčně ze ScienceDirect (DOI, licence UK): http://dx.doi.org/10.1016/j.ipm.2012.10.001.
Preprint autora dostupný [2013-05-21] také z webu autora: http://pure.iva.dk/files/34910652/The_facet_analytic_approach_final.doc