2021. Common Fixed Point Theorems and $Q$-Property for Quasi-Contractive Mappings under $c$-Distance on TVS-Valued Cone Metric Spaces Without the Normality. Communications in Mathematical Research. 32, 3 (May 2021), 229–240. DOI:https://doi.org/10.13447/j.1674-5647.2016.03.05.