Gratzer, George, author
Academic Press, 1978
Buku Teks
North-Holland Pub., 1976
Buku Teks
Andhika Oxalion, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2007
UI - Skripsi (Membership)
Traub, J.F., author
Academic Press, 1980
Buku Teks
Boulding, Kenneth E. (Kenneth Ewart), 1910-1993, author
Harper, 1963
Buku Teks