Hadi Kusalamwardi
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1985
UI - Skripsi (Membership)
Tsichritzis, Dionysios C.
Academic Press, 1977
Buku Teks
Cardenas, Alfonso F.
Allyn and Bacon, 1979
Buku Teks
Date, C.J.
North Holland, 1975
Buku Teks
Martin, James
Prentice-Hall, 1976
Buku Teks