In the November 1978 Kickshaws, Harry and Mary Hazard presented a word game in which two players alternately label with letters the vertices of a cube, each player's object being to form words encircling the square faces and block the other player from doing this. The game suggested the following challenge: label the vertices of each of the five Platonic solids with letters of the alphabet, none repeated, so that words can be formed out of the letters assigned to the vertices of each face.
Eckler, A. Ross
Word Ways: Vol. 13
, Article 3.
Available at: http://digitalcommons.butler.edu/wordways/vol13/iss1/3