Marc Abrahams explains, in one of his weekly Guardian columns:
In 2003, an independent scholar from New Jersey began submitting limericks for a competition in mini-AIR, the monthly online supplement to my magazine, Annals of Improbable Research. The contest challenges readers to read an off-putting scholarly citation, and explain it in limerick form. Martin Eiger so consistently won that we eventually banned him as an unfair competitor, gave him the title Limerick laureate, and now publish him every month. He handles a huge range of subject matter.
An early Eiger limerick summarised a Japanese study called Pharmacological Aspects of Ipecac Syrup (TJN-119) - Induced Emesis in Ferrets:
If you're hoping to hash out a thesis,
And stuck for a topic: emesis,
As triggered in ferrets
Much more than a mere exegesis.
Several other examples of Eiger's limericks can be found here .