@article{PORMA_1969__28_1_115081,
     author = {Hsiang, Fu Cheng},
     title = {An integral inequality},
     journal = {Portugaliae mathematica},
     pages = {63--66},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {1969},
     mrnumber = {0281859},
     zbl = {0216.09406},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1969__28_1_115081/}
}