In the February 2007 Kickshaws, Dave Morice presented what was probably an entirely new logological object, a limerick of his own devising which was also an end-to-end word-unit palindrome. Dave further wondered whether it would be possible to compose a letter-unit version of such a palindromical limerick.
"Return of the Palimerick,"
Word Ways: Vol. 40
, Article 24.
Available at: http://digitalcommons.butler.edu/wordways/vol40/iss2/24