직교다항식

• Ramanujan's Extensions of the Gamma and Beta Functions
  
  • Richard Askey
  • The American Mathematical Monthly, Vol. 87, No. 5 (May, 1980), pp. 346-359
• Applications of Theta Functions to Arithmetic
  
  • G. D. Nichols
  • The American Mathematical Monthly, Vol. 45, No. 6 (Jun. - Jul., 1938), pp. 363-368