1. C. Alegre and S. Romaguera, The Hahn-Banach extension theorem for fuzzy normed spaces revisited, Abstr. Appl. Anal., Vol. 2014. Hindawi, 2014.
2. C. Alegre and S. Romaguera, On the uniform boundedness theorem in fuzzy quasi-normed spaces, Fuzzy Sets Syst. 2016, 282, 143-153.
3. A.V. Arhangel'shiǐ and M. Tkachenko, Topological Groups and Related Structures, Atlantis Press, World Sci., 2008.
4. T. Bag and S.K. Samanta, Finite dimensional fuzzy normed linear spaces, Ann. Fuzzy Math. Inform., 2013, 6(2), 271-283.
5. V. Gregori and S. Romaguera, Fuzzy quasi-metric spaces, Appl. Gen. Topol., 2004, 5(1), 129-136.