@article{RSMUP_1970__43__229_0,
     author = {Singh, S. P.},
     title = {On a fixed point theorem in metric space},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {229--232},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {43},
     year = {1970},
     mrnumber = {279796},
     zbl = {0236.54035},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1970__43__229_0/}
}