Artikel Jurnal
Panjaitan, Elman
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1999
UI - Tesis Membership
edited by J.N. Chapman and A.J. Craven
Scottish Universities Summer School in Physics, 1984
Buku Teks SO
Fischer, Robert B.
Indiana University Press, 1954
Buku Teks
World Scientific, 1992
Buku Teks SO