@article{AM2_1976__14_136623,
     author = {M.A. McKiernan},
     title = {The matrix equation a(x...y) = a(x)+a(x)a(y)+a(y). {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {514--515},
     year = {1976},
     volume = {14},
     url = {http://geodesic.mathdoc.fr/item/AM2_1976__14_136623/}
}