In its traditional form, the word ladder is a one-dimensional structure; even word ladder networks with many branching proceed in a basically linear fashion. But one can conceive of word ladders which extend solidly in two and three dimensions, in the manner of the familiar word square and word cube. This article will suggest some definitions and rules of construction which might reasonably apply to such arrays, and offer some illustrative examples.
"Word Ladder Squares and Cubes,"
Word Ways: Vol. 31
, Article 3.
Available at: http://digitalcommons.butler.edu/wordways/vol31/iss4/3