Jackson, Robert R.; Chris M. Carter; Michael S. Tarsitano (2001). „Trial-and-error solving of a confinement problem by a jumping spider, Portia fimbriata”. Behaviour. Leiden: Koninklijke Brill. 138 (10): 1215—1234. ISSN0005-7959. JSTOR4535886. doi:10.1163/15685390152822184.
Jackson, Robert R.; Chris M. Carter; Michael S. Tarsitano (2001). „Trial-and-error solving of a confinement problem by a jumping spider, Portia fimbriata”. Behaviour. Leiden: Koninklijke Brill. 138 (10): 1215—1234. ISSN0005-7959. JSTOR4535886. doi:10.1163/15685390152822184.
Jackson, Robert R.; Chris M. Carter; Michael S. Tarsitano (2001). „Trial-and-error solving of a confinement problem by a jumping spider, Portia fimbriata”. Behaviour. Leiden: Koninklijke Brill. 138 (10): 1215—1234. ISSN0005-7959. JSTOR4535886. doi:10.1163/15685390152822184.