Morgenstern, Oskar
Princeton University Press, 1963
Buku Teks
Fox, Karl August, 1917-, author
John Wiley and Sons, 1968
Buku Teks
M.I.T. Press , 1971
Buku Teks
Dorfman, Robert, author
McGraw-Hill, 1958
Buku Teks
Gandolfo, Giancarlo
North-Holland , 1981
Buku Teks