In "Designing a List of Word Squares" (August 1996), I showed that a word list intended for finding squares is improved by balancing the beginning and ending letter-frequencies of words. In "Bottom-Up Finds Some Squares Faster" (November 1996) I showed that under certain conditions the old formists' bottom-up strategy is superior to a top-down one.
"Top-Down Seems Best in Full Searches,"
Word Ways: Vol. 30
, Article 14.
Available at: http://digitalcommons.butler.edu/wordways/vol30/iss1/14