On a fourth order Wronskian associated with classical orthogonal polynomials. M.K. Das — 1974 Publications de l'Institut Mathématique [Elektronische Ressource]
Some polynomials related to the generalized Laguerre polynomials. S.K. Chatterjea; M.K. Das — 1966 Publications de l'Institut Mathématique [Elektronische Ressource]