@article{NUMA_1970__15_131977,
     author = {J. SCHR\"ODER},
     title = {Proving {Inverse-Positivity} of {Linear} {Operators} by {Reduction.}},
     journal = {Numerische Mathematik},
     pages = {100--108},
     publisher = {mathdoc},
     volume = {15},
     year = {1970},
     zbl = {0187.09203},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1970__15_131977/}
}