@book{4311, author = {Jirari, Alouf,}, title = {Second-order Sturm-Liouville difference equations and orthogonal polynomials /}, publisher = {American Mathematical Society, }, year = {1994.}, series = {Memoirs of the American Mathematical Society,}, address = {Providence : }, note = {Ver Colección AMS. Memoirs of the American Mathematical Society. } }