1916 Trans. Amer. Math. Soc.17 395 The elements of the infinite sequence of matrix productsRm+1(x)Q1−1(x)..will certainly converge absolutely and uniformly to the elements of a limit matrix if [etc.].
1947 S. A. StigantMod. Electr. Engin. Math. iv. 72Matrix products follow the distributive law.