참고문헌
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- Bull. Cal. Math. Soc. v.84 Generalized metric spaces and mappings with fixed point B. C. Dhage
- Amer. Math. Monthly v.76 Some results on fized points-Ⅱ R. Kannan
- Internet. J. Math. Sci. v.19 no.3 A fized point theorem for generalized metric spaces B. E. Rhoades