Valko, Peter
John Wiley & Sons, 1995
Buku Teks
Zehnder, Alan T., author
Springer, 2012
eBooks
Cherepanov, G.P., author
McGraw-Hill, 1979
Buku Teks
edited by D.R.J. Owen and A.R. Luxmoore
Pineridge Press, 1980
Buku Teks
Kundu, Tribikram, author
CRC press, 2008
Buku Teks