@article{AM2_1992__44_1_137499,
     author = {H.B. Coonce},
     title = {Permutable polynomials for several variables.},
     journal = {Aequationes mathematicae},
     pages = {292--303},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1992},
     zbl = {0766.33010},
     url = {http://geodesic.mathdoc.fr/item/AM2_1992__44_1_137499/}
}