id: 70497937 dt: a an: 70497937 au: Verma, Manisha; Varma, Vasudeva ti: Exploring keyphrase extraction and IPC classification vectors for prior art search so: CLEF (Notebook Papers/Labs/Workshop) (2011). py: 2011 pu: la: EN cc: ut: ci: li: http://clef2011.org/resources/proceedings/Verma_Clef2011.pdf