The Knowledge Level in Cognitive Architectures: Current Limitations and Possibile Developments Antonio Lieto, Christian Lebiere and Alessandro Oltramari. In "Cognitive Systems Research'’, 48, 2018. pp 39–55. https://www.sciencedirect.com/science/article/pii/S1389041716302121
"Archived copy". Archived from the original on 2015-08-12. Retrieved 2015-07-19.{{cite web}}: CS1 maint: archived copy as title (link) https://web.archive.org/web/20150812021144/http://chrest.info/history.html
The Knowledge Level in Cognitive Architectures: Current Limitations and Possibile Developments Antonio Lieto, Christian Lebiere and Alessandro Oltramari. In "Cognitive Systems Research'’, 48, 2018. pp 39–55. https://www.sciencedirect.com/science/article/pii/S1389041716302121
"Archived copy". Archived from the original on 2015-08-12. Retrieved 2015-07-19.{{cite web}}: CS1 maint: archived copy as title (link) https://web.archive.org/web/20150812021144/http://chrest.info/history.html
The Knowledge Level in Cognitive Architectures: Current Limitations and Possibile Developments Antonio Lieto, Christian Lebiere and Alessandro Oltramari. In "Cognitive Systems Research'’, 48, 2018. pp 39–55. https://www.sciencedirect.com/science/article/pii/S1389041716302121