@article{PIM_1980_N_S_28_42_a18,
     author = {Josip E. Pe\v{c}ari\'c},
     title = {On an {Inequality} of {P.m.} {Vasi\'c} and {R.r.} {Jani\'c}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {145 },
     publisher = {mathdoc},
     volume = {_N_S_28},
     number = {42},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1980_N_S_28_42_a18/}
}