@article{CM_1962-1964__15__23_0,
     author = {Ostrowski, A. M.},
     title = {A regularity condition for a class of partitioned matrices},
     journal = {Compositio Mathematica},
     pages = {23--27},
     publisher = {Kraus Reprint},
     volume = {15},
     year = {1962-1964},
     mrnumber = {136622},
     zbl = {0101.25601},
     language = {en},
     url = {http://www.numdam.org/item/CM_1962-1964__15__23_0/}
}