@article{PIM_1977_N_S_21_35_a15,
     author = {D. S. Jaggi},
     title = {An {Aproach} {To} {Fixed} {Points} {In} {Product} {Spaces}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {93 },
     publisher = {mathdoc},
     volume = {_N_S_21},
     number = {35},
     year = {1977},
     url = {http://geodesic.mathdoc.fr/item/PIM_1977_N_S_21_35_a15/}
}