1. Ad Adnadževič, D.: Some properties of A-spaces. Soviet Math. Dokl. 14, 492–496 (1973)
2. An 1 Antoine, Ph.: Extension minimale de la catégorie des espaces topologiques. Compt. Rend. Acad. Sci. Paris, sér. A, 262, 1389–92 (1966) 2 Antoine, Ph.: Etude élémentaire des catégories d'ensembles structurés. Bull. Soc. Math. Belgique 18, 142–164 and 387–414 (1966)
3. Lect. Notes in Math.;M. Artin,1972
4. B B Banaschewski, B. and G. Bruns: Categorical Characterization of the Mac Neille completion. Arch. d. Math. 18, 369–377 (1967)
5. Bar 1 Baron, S.: Note on epi in To. Canad. Math. Bull. 11, 503–504 (1968) 2 Baron, S.: Reflectors as compositions of epi-reflectors. Trans. AMS. 136, 499–508 (1969)