@article{AM2_1986__31_137162,
     author = {K. Ozeki and J.A. MacDougall},
     title = {The octahedron equation implies the cube equation: an elementary proof.},
     journal = {Aequationes mathematicae},
     pages = {243--246},
     publisher = {mathdoc},
     volume = {31},
     year = {1986},
     zbl = {0608.39006},
     url = {http://geodesic.mathdoc.fr/item/AM2_1986__31_137162/}
}