Bonino, Dario; Ciaramella, Alberto; Corno, Fulvio (2010). "Review of the state-of-the-art in patent information and forthcoming evolutions in intelligent patent informatics". World Patent Information. 32 (1): 30–38. Bibcode:2010WPatI..32...30B. doi:10.1016/j.wpi.2009.05.008.
Bonino, Dario; Ciaramella, Alberto; Corno, Fulvio (2010). "Review of the state-of-the-art in patent information and forthcoming evolutions in intelligent patent informatics". World Patent Information. 32 (1): 30–38. Bibcode:2010WPatI..32...30B. doi:10.1016/j.wpi.2009.05.008.