Francisco Gallego Lupiáñez
- Finite-to-One Fuzzy Maps and Fuzzy Perfects Maps. KYBERNETIKA 34 (1998) n.2, 163-169.
- Proto-Metrizable Fuzzy Topological Spaces. KYBERNETIKA 35 (1999) n.2, 209-213.
- On Michálek's Fuzzy Topological Spaces. KYBERNETIKA 37 (2001) n.2, 159-163.