Lindsey, William C
Prentice-Hall, 1973
Buku Teks
Green, William B.
Van Nostrand Reinhold Co., 1983
Buku Teks
editors, Harry Dym, Mauricio C. de Oliveira, Mihai Putinar
Springer, 2012
eBooks
Nickels, William G.
McGraw-Hill , 1999
Buku Teks
Izenour, George C., author
Yale University Press, 1996
Buku Teks SO