Khuri, Soumaya M. Baer endomorphism rings and closure operators. (English) Zbl 0363.16010 Can. J. Math. 30, 1070-1078 (1978). MSC: 16P60 16U99 16D40 06A15 PDF BibTeX XML Cite \textit{S. M. Khuri}, Can. J. Math. 30, 1070--1078 (1978; Zbl 0363.16010) Full Text: DOI 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