Olver, F. W. J.
Academic Press, 1974
Buku Teks
Brychkov, Yury A., author
CRC Press , 2008
Buku Referensi
edited by Richard A. Askey
Academic Press , 1975
Buku Teks
Indah Permata Dewi, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2016
UI - Skripsi (Membership)
Gohberg, Israel, author
Academic Pres, 1982
Buku Teks