Filippov's operation and some attributes
John S. Spraker, Daniel C. Biles (1994)
Czechoslovak Mathematical Journal
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John S. Spraker, Daniel C. Biles (1994)
Czechoslovak Mathematical Journal
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Garyfalos Papaschinopoulos, John Schinas (1994)
Czechoslovak Mathematical Journal
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Dilip Kumar Ganguly, M. Majumdar (1996)
Czechoslovak Mathematical Journal
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