Nemchinov, V. S
Oliver & Boyd 1964, 1964
Buku Teks
Tufte, Edward R.
Princeton University Press, 1978
Buku Teks
SGV-Soong, 1983
Buku Teks
Einaudi, Mario
Cornell University Press , 1953
Buku Teks
edited by Richard N. Gardner and Max F. Millikan
Praeger , 1968
Buku Teks