@article{GDZPPN00241175X,
title = {Non-Replaceable Matrices.},
journal = {Mathematische Zeitschrift},
volume = {129},
year = {1972},
pages = {21-24},
zbl = {0239.40004},
url = {http://dml.mathdoc.fr/item/GDZPPN00241175X}
}
Wilansky, Albert; Snyder, Andrew K. Non-Replaceable Matrices.. Mathematische Zeitschrift, Tome 129 (1972) pp. 21-24. http://gdmltest.u-ga.fr/item/GDZPPN00241175X/