@article{10_4064_am_21_2_257_263,
     author = {K. Lau and K. Zi\k{e}tak},
     title = {A note on linear approximations of matrices},
     journal = {Applicationes Mathematicae},
     pages = {257--263},
     publisher = {mathdoc},
     volume = {21},
     number = {2},
     year = {1991},
     doi = {10.4064/am-21-2-257-263},
     zbl = {0743.15015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-21-2-257-263/}
}