@inproceedings{michael1992the,
  title={The irreducibility of all but finitely many Bessel Polynomials},
  author={Michael Filaseta},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203324778509516},
  booktitle={Acta Mathematica},
  volume={174},
  number={2},
  pages={383-397},
  year={1992},
}
             
            
                
Michael Filaseta. The irreducibility of all but finitely many Bessel Polynomials. 1992. Vol. 174. In Acta Mathematica. pp.383-397. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203324778509516.