1. Least Positive Sequence with Hankel Transform {1, 1, 1, 1, 1,...}. The On-Line Encyclopedia of Integer Sequenceshttp://oeis.org
2. The Hankel Transform and Some of its Propeties;Layman;J. Integer Seq.,2001
3. A Characterization of the bell numbers
4. The r-Bell numbers;Mezo;J. Integer Seq.,2011
5. The Hankel Transform of Generalized Bell Numbers and Its q-Analogue;Corcino;Util. Math.,2012