@article{PIM_1982_N_S_31_45_a8,
     author = {I. Jo\'o and L. L. Stach\'o},
     title = {Generalization {Of} {An} {Inequality} {Of} {G.} {P\'olya} {Concerning} {The} {Eigenfrequences} {Of} {Vibrating} {Bodies}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {65 },
     publisher = {mathdoc},
     volume = {_N_S_31},
     number = {45},
     year = {1982},
     url = {http://geodesic.mathdoc.fr/item/PIM_1982_N_S_31_45_a8/}
}