1. Shirky
"Ontology is Overrated : Categories, Links, and Tags"
2. Tom Gruber
"Ontology of Folksonomy: A Mash-up of Apples and Oranges"
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3. Emanuele Quintarelli
"Folksonomies: power to the people"
4. Torben Knerr (2006)
Tagging Ontology - Towards a Common Ontology for Folksonomies
5. Richard Newman
"Tag Ontology design"
"Ontology is Overrated : Categories, Links, and Tags"
2. Tom Gruber
"Ontology of Folksonomy: A Mash-up of Apples and Oranges"
""
3. Emanuele Quintarelli
"Folksonomies: power to the people"
4. Torben Knerr (2006)
Tagging Ontology - Towards a Common Ontology for Folksonomies
5. Richard Newman
"Tag Ontology design"