[1] Arhangel’skii A. V.: A criterion for the existence of a bicompact element in a continuous decomposition. A theorem on the invariance of weight under open–closed finite–to–one mappings. Soviet Math. Dokl. 7 (1966), 249–253

[2] Arhangel’skii A. V.: A theorem of the metrizability of the inverse image of a metric space under an open–closed finite–to–one mapping. Example and unsolved problems. Soviet Math. Dokl. 7 (1966), 1258–1262 MR 0206899

[3] Chaber J.: Open finite–to–one images of metric spaces. Topology Appl. 14 (1982), 241–246 MR 0675587 | Zbl 0505.54013

[4] Chang C. L.: Fuzzy topological spaces. J. Math. Anal. Appl. 24 (1968), 182–190 MR 0236859 | Zbl 0167.51001

[5] Christoph F. T.: Quotient fuzzy topology and local compactness, J. Math. Anal. Appl. 57 (1977), 497–504 MR 0440480

[6] Čoban M. M.: Open finite–to–one mappings. Soviet Math. Dokl. 8 (1967), 603–605

[7] El–Monsef M. E. A., Zeyada F. M., El–Deeb S. N., Hanafy I. M.: Good extensions of paracompactness. Math. Japon. 37 (1992), 195–200 MR 1148533 | Zbl 0772.54007

[8] Ghosh B.: Directed family of fuzzy sets and fuzzy perfect maps. Fuzzy Sets and Systems 75 (1995), 93–101 MR 1351595 | Zbl 0863.54003

[9] Gittings R. F.: Finite–to–one open maps of generalized metric spaces. Pacific J. Math. 59 (1975), 33–41 MR 0385787 | Zbl 0296.54011

[10] Gittings R. F.: Open mapping theory. In: Set–theoretic Topology (G. M. Reed, ed.), Academic Press, New York 1977, pp. 141–191 MR 0482628 | Zbl 0401.54008

[11] Kohli J. K.: Finite–to–one maps and open extensions of maps. Proc. Amer. Math. Soc. 48 (1975), 464–468 MR 0370472 | Zbl 0323.54007

[12] Lowen R.: Fuzzy topological spaces and fuzzy compactness. J. Math. Anal. Appl. 56 (1976), 621–633 MR 0440482 | Zbl 0342.54003

[13] Lowen R.: A comparison of different compactness notions in fuzzy topological spaces. J. Math. Anal. Appl. 64 (1978), 446–454 MR 0497443 | Zbl 0381.54004

[14] Luo M. K.: Paracompactness in fuzzy topological spaces. J. Math. Anal. Appl. 130 (1988), 55–77 MR 0926828 | Zbl 0642.54006

[15] Lupiáñez F. G.: Fuzzy perfect maps and fuzzy paracompactness. Fuzzy Sets and Systems, to appear MR 1640139 | Zbl 0941.54008

[16] Martin H. W.: Weakly induced fuzzy topological spaces. J. Math. Anal. Appl. 78 (1980), 634–639 MR 0601558 | Zbl 0463.54007

[17] Okuyama A.: Note on inverse images under finite–to–one mappings. Proc. Japan Acad. 43 (1967), 953–956 MR 0234416

[18] Pareek C. M.: Open finite–to–one mappings on $p$–spaces. Math. Japon. 28 (1983), 9–13 MR 0692548 | Zbl 0531.54025

[19] Proizvolov V. V.: Finitely multiple open mappings. Soviet Math. Dokl. 7 (1966), 35–38 MR 0188991

[20] Pu P.–M., Liu Y.–M.: Fuzzy topology I. Neighborhood structure of a fuzzy point and Moore–Smith convergence. J. Math. Anal. Appl. 76 (1980), 571–599 MR 0587361 | Zbl 0447.54006

[21] Sadyrkhanov R. S.: A finite–to–one criterion for covering maps. Soviet Math. Dokl. 28 (1983), 587–590 Zbl 0558.54011

[22] Shostak A. P.: Two decades of fuzzy topology: basic ideas, notions, and results. Russian Math. Surveys 44 (6) (1989), 125–186 MR 1037011 | Zbl 0716.54004

[23] Srivastava R., Lal S. N.: On fuzzy proper maps. Mat. Vesnik 38 (1986), 337–342 MR 0870958 | Zbl 0654.54005

[24] Srivastava R., Lal S. N., Srivastava A. K.: Fuzzy Hausdorff topological spaces, J. Math. Anal. Appl. 81 (1981), 497–506 MR 0622833

[25] Srivastava R., Lal S. N., Srivastava A. K.: Fuzzy $T_1$–topological spaces. J. Math. Anal. Appl. 102 (1984), 442–448 MR 0755975

[26] Tanaka Y.: On open finite–to–one maps. Bull. Tokyo Gakugei Univ., Ser. IV, 25 (1973), 1–13. MR 0346730 | Zbl 0355.54008

[27] Wong C. K.: Fuzzy topology: product and quotient theorems. J. Math. Anal. Appl. 45 (1974), 512–521 MR 0341366 | Zbl 0273.54002