1
Published: 1997
Superior document: Jyväskylä studies in education, psychology and social research 135
2
Published: 1975
Superior document: Acta Universitatis Ouluensis : A, Scientiae rerum naturalium 32
3
Published: 1984
Superior document: Bayreuther mathematische Schriften 17
4
Published: 2006
Superior document: Suomen Akatemian julkaisuja 2006,8
5
Published: 1979
Superior document: Acta Universitatis Ouluensis : A, Scientiae rerum naturalium 81
6
Published: [2021]
Superior document: Title is part of eBook package: De Gruyter DG Ebook Package English 2021
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7
Published: [2019]
Superior document: Title is part of eBook package: De Gruyter DGBA Mathematics - <1990
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8
Published: [2012]
Superior document: Title is part of eBook package: De Gruyter Cornell University Press Backlist 2000-2013
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9
Published: [2020]
Superior document: Title is part of eBook package: De Gruyter DGBA Mathematics - <1990
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10
Published: [2011]
Superior document: Title is part of eBook package: De Gruyter DGBA Mathematics - 1990 - 1999
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