Tamburini, Maria Chiara Estensioni di operatori di chiusura. (Italian) Zbl 0265.06006 Ist. Lombardo Accad. Sci. Lett., Rend., Sez. A 103, 856-870 (1969). MSC: 06B23 06A15 PDF BibTeX XML Cite \textit{M. C. Tamburini}, Ist. Lombardo Accad. Sci. Lett., Rend., Sez. A 103, 856--870 (1969; Zbl 0265.06006) OpenURL
Achache, Achille Structure de l’ensemble des fermetures d’un treillis complet. (French) Zbl 0265.06005 Port. Math. 28, 111-119 (1969). MSC: 06B23 06A15 20L05 PDF BibTeX XML Cite \textit{A. Achache}, Port. Math. 28, 111--119 (1969; Zbl 0265.06005) Full Text: EuDML OpenURL
Fattorosi-Barnaba, Maurizio Intorno ad alcuni operatori di chiusura sugli insiemi di leggi. (Italian) Zbl 0247.08003 Rend. Mat., VI. Ser. 2, 355-368 (1969). MSC: 08B99 08Axx 06A15 PDF BibTeX XML Cite \textit{M. Fattorosi-Barnaba}, Rend. Mat., VI. Ser. 2, 355--368 (1969; Zbl 0247.08003) OpenURL
Egan, H. L. Galois theory for groups. (English) Zbl 0214.27503 Port. Math. 28, 205-214 (1969). MSC: 20F14 06A15 PDF BibTeX XML Cite \textit{H. L. Egan}, Port. Math. 28, 205--214 (1969; Zbl 0214.27503) Full Text: EuDML OpenURL
Wilker, P. f-closure algebras. (English) Zbl 0208.29204 Fundam. Math. 64, 105-119 (1969). MSC: 03G99 06A15 PDF BibTeX XML Cite \textit{P. Wilker}, Fundam. Math. 64, 105--119 (1969; Zbl 0208.29204) Full Text: DOI EuDML OpenURL
Derderian, J. C. Galois connections and pair algebras. (English) Zbl 0208.02601 Can. J. Math. 21, 498-501 (1969). MSC: 06A15 PDF BibTeX XML Cite \textit{J. C. Derderian}, Can. J. Math. 21, 498--501 (1969; Zbl 0208.02601) Full Text: DOI OpenURL