Very recently, Ahmed et al. introduced the notion of quaternion-valued metric as a generalization of metric and proved a common fixed point theorem in the context of quaternion-valued metric space. In this paper, we will show that the quaternion-valued metric spaces are subspaces of cone metric spaces. Consequently, the fixed point results in such spaces can be derived as a consequence of the corresponding existing fixed point result in the setting cone metric spaces.
"Remarks on Some Recent Fixed Point Results on Quaternion-Valued Metric Spaces." Abstr. Appl. Anal. 2014 1 - 8, 2014. https://doi.org/10.1155/2014/171624