Pop, I. A shape theory for closure algebras. (English) Zbl 0519.55006 An. Stiint. Univ. Al. I. Cuza Iasi, N. Ser., Sect. Ia 27, 279-286 (1981). MSC: 55P55 06E10 54C56 06A15 PDF BibTeX XML OpenURL
Vescan, Robert T.; Tofan, Ioan Interior systems and interior operators. (English) Zbl 0376.06004 An. Stiint. Univ. Al. I. Cuza Iasi, n. Ser., Sect. Ia 19, 311-319 (1973). MSC: 06A15 06B05 PDF BibTeX XML Cite \textit{R. T. Vescan} and \textit{I. Tofan}, An. Științ. Univ. Al. I. Cuza Iași, N. Ser., Secț. Ia 19, 311--319 (1973; Zbl 0376.06004) OpenURL