@article{10_4064_cm_36_1_81_86,
     author = {W. A. Kirk},
     title = {Caristi's fixed point theorem and metric convexity},
     journal = {Colloquium Mathematicum},
     pages = {81--86},
     publisher = {mathdoc},
     volume = {36},
     number = {1},
     year = {1976},
     doi = {10.4064/cm-36-1-81-86},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-36-1-81-86/}
}