It's been more than a decade since Maxey Brooke surveyed the various ways in which the limerick has been gimmicked (see "Limerick-Gimerick", February 1980). It's time to revisit this specialized niche of wordplay.
"A Few Tricky Limericks,"
Word Ways: Vol. 25
, Article 15.
Available at: http://digitalcommons.butler.edu/wordways/vol25/iss2/15