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Bourgin, D.G. (1952)
Portugaliae mathematica
Similarity:
Bourgin, D.G. (1952)
Portugaliae mathematica
Similarity:
Sahib Ram Mandan (1966)
Czechoslovak Mathematical Journal
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Sahib Ram Mandan (1965)
Časopis pro pěstování matematiky
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Jackson, Lloyd (1952)
Portugaliae mathematica
Similarity:
Abian, Alexander (1974)
Portugaliae mathematica
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Pereira Coelho, R. (1947)
Portugaliae mathematica
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Weston, J.D. (1956)
Portugaliae mathematica
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