TY - BOOK TI - Advances in information retrieval: 43rd European Conference on IR Research, ECIR 2021, virtual event, March 28-April 1, 2021, proceedings T3 - T3 - 12656-12657 AU - Hiemstra, Djoerd editor = {Hiemstra, Djoerd}, A2 - Hiemstra, Djoerd CY - Cham, Switzerland PB - Springer PY - 2021 PY - 2021 LA - English KW - Information retrieval KW - Congresses. KW - Information retrieval SN - 9783030721121 SN - 9783030722395 N1 - Cancelled in Lucca, Italy due to Covid-19, held online. N1 - Formerly CIP. N1 - Electronic ISSN: 1611-3349. UR - http://link.springer.com/ UR - https://katalog.fid-bbi.de/Record/181-020135447 ER -