WILLIS, Craig, LOSEE, Robert M. A random walk on an ontology: using thesaurus structure for automatic subject indexing. In: Journal of the American Society for Information Science and Technology. July 2013, 64(7), 1330-1344. doi:10.1002/asi.22853. ISSN 1532-2882 (Print). ISSN 1532-2890 (Online).
Dostupný také komerčně z Wiley Online Library (DOI, Licence UK): http://dx.doi.org/10.1002/asi.22853.
Dostupný komerčně také z EBSCOhost (LISS, Licence UK): http://search.ebscohost.com/.