Brian Cantor, Patrick Grant, Colin Johnston, editor
Taylor & Francis Group, 2008
Buku Teks
edited by T. Kakeshita, Takashi Fukuda, Avadh Saxena and Antoni Planes
Springer, 2012
eBooks
edited by G.W. Crabtree and P. Vashishta
North-Holland , 1982
Buku Teks
Artikel Jurnal
Sethi, H. M.
New Delhi: Tata McGraw-Hill, 1991
Buku Teks