Research problems
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Publication:5916465
DOI10.1007/BF01848155zbMath0683.52013OpenAlexW4253417760MaRDI QIDQ5916465
Publication date: 1989
Published in: Periodica Mathematica Hungarica (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.1007/bf01848155
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