Advances in Information Retrieval
43rd European Conference on IR Research, ECIR 2021, Virtual Event, March 28 – April 1, 2021, Proceedings, Part I
http://link.springer.com/openurl.asp?genre=issue&issn=0302-9743&volume=12656
43rd European Conference on IR Research, ECIR 2021, Virtual Event, March 28 – April 1, 2021, Proceedings, Part II
http://link.springer.com/openurl.asp?genre=issue&issn=0302-9743&volume=12657