@article{PORMA_1961__20_1_114849,
     author = {Marcus, Marvin and Khan, N.A.},
     title = {Some generalizations of {Kantorovich's} inequality},
     journal = {Portugaliae mathematica},
     pages = {33--38},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1961},
     mrnumber = {0130261},
     zbl = {0118.25902},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1961__20_1_114849/}
}