Pertti Vakkari

	2009
23		Pertti Vakkari, Mari Taneli: Comparing Google to Ask-a-Librarian Service for Answering Factual and Topical Questions. ECDL 2009: 352-363
22		Tuula Poikonen, Pertti Vakkari: Lay persons' and professionals' nutrition-related vocabularies and their matching to a general and a specific thesaurus. J. Information Science 35(2): 232-243 (2009)
21		Piritta Numminen, Pertti Vakkari: Question types in public libraries' digital reference service in Finland: Comparing 1999 and 2006. JASIST 60(6): 1249-1257 (2009)
	2008
20		Pertti Vakkari: Perceived influence of the use of electronic information resources on scholarly work and publication productivity. JASIST 59(4): 602-612 (2008)
	2007
19		Sanna Talja, Pertti Vakkari, Jenny Fry, Paul Wouters: Impact of research cultures on the use of digital library resources. JASIST 58(11): 1674-1685 (2007)
	2006
18		Saila Huuskonen, Pertti Vakkari: Situational relevance and task outcome. IIiX 2006: 15-19
	2005
17		Pertti Vakkari, Sanna Talja: The Influence of the Scatter of Literature on the Use of Electronic Resources Across Disciplines: A Case Study of FinELib. ECDL 2005: 207-217
16		Sami Serola, Pertti Vakkari: The anticipated and assessed contribution of information types in references retrieved for preparing a research proposal. JASIST 56(4): 373-381 (2005)
	2004
15		Anne Sihvonen, Pertti Vakkari: Subject Knowledge, Thesaurus-assisted Query Expansion and Search Success. RIAO 2004: 393-404
14		Sanna Törmä, Pertti Vakkari: Discipline, availability of electronic resources and the use of Finnish National Electronic Library - FinELib. Inf. Res. 10(1): (2004)
13		Pertti Vakkari, Eero Sormunen: The influence of relevance levels on the effectiveness of interactive information retrieval. JASIST 55(11): 963-969 (2004)
	2003
12		Pertti Vakkari, Mikko Pennanen, Sami Serola: Changes of search terms and tactics while writing a research proposal: A longitudinal case study. Inf. Process. Manage. 39(3): 445-463 (2003)
11		Mikko Pennanen, Pertti Vakkari: Students' conceptual structure, search process, and outcome while preparing a research proposal: A longitudinal case study. JASIST 54(8): 759-770 (2003)
	2002
10		Harry Bruce, Raya Fidel, Peter Ingwersen, Pertti Vakkari: Emerging Frameworks and Methods: Proceedings of the Fourth International Conference on Conceptions of Library and Information Science (CoLIS 4) Libraries Unlimited 2002
9		Pertti Vakkari: Subject Knowledge, Source of Terms, and Term Selection in Query Expansion: An Analytical Study. ECIR 2002: 110-123
	2001
8		Pertti Vakkari: Changes in Search Tactics and Relevance Judgements when Preparing a Research Proposal A Summary of the Findings of a Longitudinal Study. Inf. Retr. 4(3-4): 295-310 (2001)
	2000
7		Pertti Vakkari: Cognition and changes of search terms and tactics during task performance: A longitudinal case study. RIAO 2000: 894-907
6		Pertti Vakkari: Relevance and contributing information types of searched documents in task performance. SIGIR 2000: 2-9
	1999
5		Tatjana Aparac, Tefko Saracevic, Peter Ingwersen, Pertti Vakkari: Digital Libraries: Interdisciplinary Concepts, Challenges and Opportunities, CoLIS3 Proceedings, Dubrovnik, Croatia, 23-26 May 1999 Benja Publishing, Lokve, Croatia 1999
4		Carol Collier Kuhlthau, Pertti Vakkari: Editorial: Information seeking in context (ISIC). Inf. Process. Manage. 35(6): 723-725 (1999)
3		Pertti Vakkari: Task complexity, problem structure and information actions - Integrating studies on information seeking and retrieval. Inf. Process. Manage. 35(6): 819-837 (1999)
	1998
2		Pertti Vakkari: Trends in ... a Critical Review: Growth of Theories on Information Seeking: An Analysis of Growth of a Theoretical Research Program on the Relation Between Task Complexity and Information Seeking. Inf. Process. Manage. 34(2-3): 361-382 (1998)
	1993
1		Kalervo Järvelin, Pertti Vakkari: The Evolution of Library and Information Science 1965-1985: A Content Analysis of Journal Articles. Inf. Process. Manage. 29(1): 129-144 (1993)

Coauthor Index

1	Tatjana Aparac	[5]
2	Harry Bruce	[10]
3	Raya Fidel	[10]
4	Jenny Fry	[19]
5	Saila Huuskonen	[18]
6	Peter Ingwersen	[5] [10]
7	Kalervo Järvelin	[1]
8	Carol Collier Kuhlthau	[4]
9	Piritta Numminen	[21]
10	Mikko Pennanen	[11] [12]
11	Tuula Poikonen	[22]
12	Tefko Saracevic	[5]
13	Sami Serola	[12] [16]
14	Anne Sihvonen	[15]
15	Eero Sormunen	[13]
16	Sanna Talja	[17] [19]
17	Mari Taneli	[23]
18	Sanna Törmä	[14]
19	Paul Wouters	[19]

Colors in the list of coauthors