Waldi
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1998
UI - Skripsi Membership
Koningsveld, R.
Oxrord University Press, 2008
Buku Teks
Yukalov, V.I.
World Scientific, 1990
Buku Teks
Patashinskii, A.Z.
Pergamon Press, 1979
Buku Teks
edited by Robert A. Fisher
Academic Press, 1983
Buku Teks