@article{NUMA_1964__6_131597,
     author = {A.W. MARSHALL and I. OLKIN},
     title = {Inclusion  {Theorems}  for  {Eigenvalues}  from {Probability} {Inequalities.}},
     journal = {Numerische Mathematik},
     pages = {98--102},
     publisher = {mathdoc},
     volume = {6},
     year = {1964},
     zbl = {0131.24903},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1964__6_131597/}
}