Enriching Patent Search with External Keywords: a Feasibility Study Ivelina Nikolova author Irina Temnikova author Galia Angelova author 2013-09 text Proceedings of the International Conference Recent Advances in Natural Language Processing RANLP 2013 Ruslan Mitkov editor Galia Angelova editor Kalina Bontcheva editor INCOMA Ltd. Shoumen, BULGARIA Hissar, Bulgaria conference publication nikolova-etal-2013-enriching https://aclanthology.org/R13-1069/ 2013-09 525 531